DLE communities are getting more and more adepts that want to turn their sites on invite only here is a module designed for this option.
Invitation System ver 3.2 present a big update from the version 3.1 and this is the option to assign/give invites to a specific group of members from admin panel
Invitation System ver. 3.2
Installation: Inside archive
Admin panel settings
Give invites to a specific user from admin panel
Give invites to all members from a goup from admin panel
Control all invites from all the users from admin panel