Enhances the Post "Visibility" options within the edit post page to allow specific users or groups of users access to the post.
First thing to do is to get to the Settings -> Post Access Controller page and make sure the configuration options are all what you would like.
This is the listing of all the access control groups that have been setup and their maintenance options ("edit" or "archive")
Clicking edit on the listing page will bring up the group maintenance form where you can specify who is in that group.
Once there are groups setup then the user maintenance page also allows for maintenance of the groups that the particular user is included in.=
On the post maintenance page with the settings making the post access control box on the right side and high priority.