[xwiki-users] Configuration to hide unnecessary details from specific group or user?

Hi All, Right now when i log in as a user who does not have admin rights, i can see see all the details(like what activity admin or any other users did .For example modification in existing page or creation of new page) on page just after login (i.e webhome page on main space). *Is there a way i can hide these unnecessary details from specific group users?* * Another question Is it possible to configure so that specific group users can not be searched by another specific group users.* i have a requirement where i want specific group users can not be searched by another specific group users. Is there a way to configure this kind of stuff? Thanks.