Thanks for everything @giacomo,
I have tried, but I do not get it to work, my knowledge is insufficient.
I hope in future updates it works.
By curiosity provides in Nethserver 6.9 and if the groups leave but leave as if they were users, not as groups containing users, so it also did not work correctly.
I think this is an important issue since if you have many users it is difficult to locate them in a list and more when many employees do not know each other or are called similar.
Thanks for everything.