Upload o3world-members-only-categories.php to the /wp-content/plugins/ directory
Activate the plugin through the Plugins menu in WordPress
Within Settings -> Privacy you'll see a new section titled Members-Only Categories. This is a listing of all your top-level categories. Tick the checkbox next to those you would consider "private."
To grant a user access to one or more of those categories, tick the checkboxes at the bottom of their Profile in a new section also titled Members-Only Categories. Only a user who can edit users (administrator) may do this.
Log out of WordPress, and log in as that user. The content on your site should now be filtered by "public" and "members-only" categories.
Requires: 3.0.0 or higher Compatible up to: 3.3.0 Last Updated: 2012-1-4 Downloads: 2,738