shawfactor

Publicly locked posts or pages functions exactly the same as published. EXCEPT only user with manage_options capability (usually only admin users) can edit the post or page.
Privately locked posts or pages functions exactly the same as private. EXCEPT only user with manage_options capability (usually only admin users) can edit the post or page.
In both cases only users with manage_options can assign a post or page to the above statuses. As a webmaster this functionality may be useful if there are posts or pages you do not want editors or similar roles amending.
Did you find this plugin helpful? Please consider <a href="https://wordpress.org/support/view/plugin-reviews/lh-locked-post-status" rel="ugc">writing a review</a>.

LH Locked Post Status

Creates two new posts statuses. Publicly locked and Privately locked.

Sean Hayes

Adds and allows customization of a visual indicator in WordPress admin for the publish state of your content. 
To help you visually organize your content viewing the All Posts screen choose colors for each post status and see your content displayed with those colors
The plugin also allows you to choose the menu location for the plugin settings page (screen shot #2)
Options included letting you choose from it’s own page or a child of either Settings or Tools menus.

Post Status Indicator

Allow color customization in WordPress admin for the publish state of your content.

LH Locked Post Status vs Post Status Indicator