Contactlist on right site

Hello,

My issue is, i have group 1 members and group 2 members .
On Contacts on the right site, group 1 can see all users with name, mail.
Can i change this anywhere, that group 1 see only group 1 members and group 2 only group 2?

Bildschirmfoto vom 2017-11-17 15-10-48