andyexeter

Post Lockdown protects your site-critical pages and posts by disabling all non-admin users’ ability to trash or delete them. 
It can also lock pages and posts, which will disable editing of the post as well as disabling trashing/deleting.
The plugin adds a new options page under the Settings menu in your WordPress admin panel which allows you to quickly search and 
select for all pages and posts of any post type. When you find the item you want to select, simply click it to move it to the right 
box and click Save Changes.
See the screenshots for an example of what an Editor would see when they view a list of posts with some locked and protected.

Post Lockdown

Works very well, my only criticism is that private posts/pages should be lockable, ie private posts should appear in the search form.

In order to lock them currently you need to publish them, then lock/portect, and then make it private again

Update!! the developer added the minor feuature request/bug. This plugin is now perfect!

Now perfect

I think the plugin is really useful, otherwise I wouldn't have made it ;)

Great Plugin

Allows admins to protect selected posts and pages so they cannot be trashed or deleted by non-admin users.

Andrés Villarreal

Hide This provides a <code>[hide]</code> shortcode that lets you hide some parts of the content from your posts and pages. You can easily manage inclusions and exclusions for hidden content in three levels: absolute, groups and capabilities, and specific user.
Maybe some part of your post should not be published yet? Or maybe you want to show some specific parts of your content to a certain group or users, let’s say your logged in users or your clients? This plugin may be the solution you need.
It’s very important to note that the content wrapped within the shortcode won’t even be printed as HTML. It will be really, really hidden. There are a lot of great plugins that hide the content via CSS and Javascript, but this is not the case. If you want your content to not be visible, but still printed as HTML, you should try one of those.
Basic usage:
<pre><code>[hide]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
This example will hide that content for all the site visitors. But you can be more specific by using attributes.
Accepted attributes:
<ul>
<li>for: (optional) your rules to hide content. You can use absolute rules (<code>all</code>, <code>none</code>, <code>[!]logged</code>), rules by roles and capabilities (<code>[!]{role}</code>, <code>[!]{role}:[!]{capability}</code>, <code>:[!]{capability}</code>), and rules by specific user (<code>userid:[!]{ID}</code>, <code>useremail:[!]{email}</code>, <code>username:[!]{username}</code>).</li>
<li>exclude: (optional) your rules to show the hidden content to some specific visitor/s. As in for, you can use absolute rules (<code>all</code>, <code>none</code>, <code>[!]logged</code>), rules by roles and capabilities (<code>[!]{role}</code>, <code>[!]{role}:[!]{capability}</code>, <code>:[!]{capability}</code>), and rules by specific user (<code>userid:[!]{ID}</code>, <code>useremail:[!]{email}</code>, <code>username:[!]{username}</code>).</li>
<li>test: (optional) for debugging purposes. The kind of output you expect. Accepts <code>content</code> and <code>empty</code>. Use it wisely, because it prints a message with the result of the test.</li>
</ul>
Some useful examples:
Hide your content to all visitors:
<pre><code>[hide]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content to all visitors, except for a specific user:
<pre><code>[hide for="all" exclude="username:foo"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content to all non-logged visitors:
<pre><code>[hide for="!logged"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content to all logged in visitors:
<pre><code>[hide for="logged"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content to all logged in visitors, except for a specific user:
<pre><code>[hide for="logged" exclude="username:foo"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for some specific role:
<pre><code>[hide for="contributor"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for two specific roles:
<pre><code>[hide for="editor, contributor"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for all visitors except for a specific role:
<pre><code>[hide for="!administrator"]Lorem ipsum dolor sit amet.[/hide]
[hide for="all" exclude="administrator"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for all visitors except for two specific roles:
<pre><code>[hide for="!administrator, !editor"]Lorem ipsum dolor sit amet.[/hide]
[hide for="all" exclude="administrator, editor"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for users with a specific role and a specific capability:
<pre><code>[hide for="some_role:do_a_barrel_roll"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for users with a specific role, not having a specific capability:
<pre><code>[hide for="some_role:!do_a_barrel_roll"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for users with a specific capability:
<pre><code>[hide for=":do_a_barrel_roll"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for a specific user by user name:
<pre><code>[hide for="username:foo"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for a specific user by user ID:
<pre><code>[hide for="userid:42"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for a specific user by user email:
<pre><code>[hide for="useremail:foo@mail.com"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
Hide your content for everyone except for a specific user by user name:
<pre><code>[hide for="username:!foo"]Lorem ipsum dolor sit amet.[/hide]
</code></pre>
You should get the idea by now. Notice how you can use <code>!</code> to deny values such as login status, roles, capabilities and user values.
<h4>Extending</h4>
This plugin offers hooks for filters, so you can modify its functionality or add your own.
<ul>
<li><code>hide_this_attributes</code>: Modify the attributes that the shortcode receives.</li>
<li><code>hide_this_content</code>: Modify the full content that the shortcode prints.</li>
<li><code>hide_this_hide_rules</code>: Modify rules for hiding content.</li>
<li><code>hide_this_show_rules</code>: Modify rules for showing content.</li>
</ul>
<h4>Contribute</h4>
You can make suggestions and submit your own modifications to this plugin on <a href="https://github.com/andrezrv/hide-this" rel="nofollow ugc">Github</a>.

Hide This

This plugin provides a shortcode that lets you hide some parts of the content from your posts and pages.

Post Lockdown vs Hide This