You can see an example here. If you see in the "online users" list", there are links of very usergroup in the forum, and if you click on them, you will have the complete list of the members of every group on the forum (admin, moderators, loyal members, new members etc.).
Also, i need to have the possibility to make some usergroups "open", so with a click you can join them (you can do this with this addon, but there are no option to make the usergroup lists open to every user). Is important also Widget Framework support os simple method to add this in the template.
The coder can resell this addon, i don't need any right, simply to have this coded. Thanks.
Maybe @Liam W or @Nobita.Kun are aivable to do this...I think it's a good idea to have lists for every usergroup public.