BuddyPress.org

@Dwenaus, thank for your answer. Yea, I understand, I can use your plugin for my needs. The only thing is, that I’d like to implement a comunity system for readers of a web magazine. There should be a group (or maybe groups) of specific members like editors of that magazine. They will use this group for their communication and posting updates about their activity. This activity and communication should be visible for all members of that community system, but it would be not good when all members would have opportunity to join group which will be called like ‘editors’, Thats way.