In Facebook groups, members who have been validated by a moderator can invite others into the group. I'm trying to figure out how to set up closed groups in Una to allow the same. I'm trying to figure out how members can set up private/closed groups where users can see the group, but they can't join unless members already in the group invite them. If I am a member of a company, a school, a scrapbooking club, or a fraternal order and we create a group, I want members of the group to be able to invite other members (who they know are members of the fraternity, school, scrapbooking club, etc.) to join.