now i am using 3.22 routeros and i am catching my userman for example by typing 172.10.10.1/userman then write my username and pass anew page appear containing list of option in the left , like users ,<<—which i can see my clients through it .
the problem is more than one user can using the same username and password
Yes, there is no way to control this option on 3.22 User Manager.
It is possible with userman test package at v4.x only.