I've several user groups that publish articles into a WP "single site".
Each group is independent of the other and has a "Team leader" and two/five writers.
The groups are competing with each other and so a my first goal is to prevent users to access and modify the articles of the other teams.
I'm testing the plugins "Role Scoper" and "Restrict categories".
Furthermore a second goal is avoid access to their media folders but I'm not able to find a plugin to restrict access to single folder (and sub folders if is possible) according to user group, custom role or user name.
Media files are published only in articles or as featured images and so I don't need a media plugin (like NG Gallery, for example) but if this is need to keep gallery private, then it is ok.
Do you have any advice for me?
Thanks in advance