gm_alex

This release is a beta release, so error could occur. If you notice an issue please create a issue here: https://github.com/GM-Alex/user-access-manager-nextgen-gallery-extension/issues 
This plugin allows you to use the <a href="https://wordpress.org/extend/plugins/user-access-manager/" rel="ugc">User Access Manager</a>-Plugin to control the access for the <a href="https://wordpress.org/extend/plugins/nextgen-gallery/" rel="ugc">NextGEN Galley</a>-Plugin. You can lock Albums, Galleries and Images.
Feature list
<ul>
<li>Hide albums (if no access)</li>
<li>User-defined album content (if no access)</li>
<li>Hide galleries (if no access)</li>
<li>User-defined gallery title (if no access)</li>
<li>User-defined gallery content (if no access)</li>
<li>Hide images (if no access)</li>
</ul>

User Access Manager – NextGEN Gallery Extension

With this plugin you can use the "User Access Manager" to control the access for the "NextGen Gallery".

andreyk

Use this plugin instead of tiresome saving images from the internet and uploading them to your blog. You learn the value of this grabber e.g. when you need to move your old non-WordPress site with many pictures to the WordPress-based. 
The plugin recognizes images by the presence (jpg|jpeg|gif|png) in URLs.
If you like this plugin please vote for it.
Please feel free to contact me with your questions or suggestions.

Remote Images Grabber

Fetches images from an URL or a piece of html-code, saves them directly into your blog media directory, and attaches to the appointed post.

User Access Manager – NextGEN Gallery Extension vs Remote Images Grabber