I'd like the user "student" to be assigned to a content type "Projectgroup". I can do this by adding a user reference to the Projectgroup content type form.
Example:
Projectgroup = Beta testers
Students (user referenced) = Kim, Joel, John.
When Kim logs in, she should only be able to post as "Beta testers".
How can i make sure when the user logs in he/she can only post with the correct projectgroup rights?