Given several applications and many users, how can I associate applications to users?

Given several applications and many users, how can I associate applications to users?

I have 3 applications and 5 users (u1,..., u5). I want application 1 to be used by users U1, U2 and application 2 to be used by users U4, U5 and application 3 to be used by user U3 only. I will be the admin for them all. Is that possible in ZOHO Creator? Thanks.