Hello WoFM members! When you are on the Women Innovating Together (formerly Women of FileMaker) space and click the "Actions" top menu, the last item is "Invite".
You can then enter the username for someone on the forum, that may not be a member!
EDIT: p.s. we may be able to invite others by email address, too. They may need to join the FM Community first, but it might be a good way to gather more members. RosemaryTietge (in all her spare time!) may be able to confirm if we have the permissions to invite by email.