The Admin of a group can use the “Change Permissions” (in Group Settings) so that the user only sees what is assigned to them.
1) Go to the group settings screen
2) Choose the “Users” tab
3) Select the user
4) Choose “Change Permissions”. Here you can change a user to an ‘Admin’ or ‘User’.
5) To manage more permissions, choose “Advanced Permissions”
6) Select the relevant permissions for this user
7) Choose “Done” to save the new permissions