plz help me
how to block clients wich user the same ident and nick

Guest68701 (guest68701@122.140.102.62) [clients]
No-Ident (no-ident@122.66.234.90) [clients]
AAlket (aalket@122.139.222.54) [clients]
Kimi (kimi@122.159.195.206)
Ambasador (ambasador@124.130.31.176)
Kimba (bimba@124.88.84.6
ARBI_17 (arbi_17@119.177.127.137)
Dalani (dalani@119.115.172.160)
Laura- (laura-@119.39.150.163)
Sdsd (sdsd@119.250.221.164)
Replay-boy (replay-boy@119.176.123.133)
Padrino (padrino@119.5.251.8 [clients]