Sorry it’s taken a while for you to get a reply here, I’m wondering if you could perhaps clarify your issue a bit more, I’m no expert on Facebook groups but it does sound like it might be something quite simple.
E.g. Elouadghiri is a Page who has posted on it’s Group. And Aman Mendrad Njayty is personal of himself, posted on Group.
How can I have Page, posted on Group?