In the process of building up our Open Knowledge Network, we are representing users of local and working groups using “badges”. You can see these here: Open Knowledge Forums
Group coordinators can add members to their group using links like the following:
https://discuss.okfn.org/groups/ok{xx}/members
For instance, the group coordinator of the OK Sweden local group can visit Open Knowledge Forums to members using the Discourse interface. Membership in Open Knowledge Sweden is viewable here: OK Sweden badge on Open Knowledge Forums