Thanks but, that hack only see multiple logins, if they has logged in same time.
What I wish is, for example:
- a user is banned
- if this person register and make login, by some way, we are notified.
Or:
- a user is banned
- and he/she has other nickname (other login). If he/she makes login, the system will notified us.
Well, some hack that view duplicate IPs, whatever.