Thanks you, but I don´t looking for a clone scanner.
The Code notify me if one user has joined #myroom before with different nick.
The result of code was this:
* bill4ever (BILL@7CE5D45C.BCBC22D.41D03C39.IP) has joined in #myroom ( before joined like bill_4 )
Imagine that bill_4 was joined 1 hour ago, and parted. After, the same user, but with different nick, has joined again.
I´m sorry, but my english´s not very good.
I hope you understand me.
Thanks very much