I'm looking for a plug that will allow basic forum interaction that is available to each WP user and is exclusive to that user + admins. So ideally each user will have a forum and admins will be able to communicate in a manor which is private for the user. I would like the forum to be viewable or have a link to it in the users profile page. I would also like to allow the user or admin to invite and share their private forum by adding an email address and then making the forum privately shared with more than one user of my site. Is it possible for the forum to be private per user?