These two plugins by Burt Adsit modify a standard bbPress forum installation to allow BuddyPress group members to carry on discussions in bbPress.
BuddyPress public groups will be read only in bbPress. Anyone wishing to participate in a public group discussion must be a member of that group in bp.
BuddyPress private and hidden groups will be hidden in bbPress. Only members of these groups will see the forums and be able to participate.
BuddyPress group admins and mods have moderator privileges in bbPress. The moderator role is restricted to their group forum.
Author homepage: http://buddypress.org/community/members/burtadsit/