wipthawat.dev wrote: Hi nant,
Your answer make me very happy. Groupjive is GPL production, that mean I can install for multi site,cann't it?
My business website require Partial User Sharing of JMS, it may request you to modify something, Can you support then?

GPL just means you can install what you download on all your websites.

This does not mean that the partial user sharing will work - we have no official (or unofficial) support for any multi-site related features so I cannot really offer any help on this.