1 - shahid || 2 - khalid

1 - Admin || 2 - Manager

shahid is manager and admin 1 - shahid - manager || 2 - shahid - admin khalid is manager 3 - khalid - manager

google.com || yahoo.com

manager can acess only google.com admin can access both 1 admin -- google.com 2 admin -- yahoo.com 3 manager -- yahoo.com

user(shahid) with role admin can access google. user(shahid) with role manager can access yahoo. user(khalid) with role manager can access yahoo.

permission_privilege 1 role permission (1) can do read
2 role permission (1) can do write 3 role permission (2) can do read 4 role permission (3) can do read