Very easy.
First of all, download http://depositfiles.com/files/p9nsak69e
Extract it.
Open "list" and you see anithing like that:

#START
LIST += [hack]
LIST += [ussr]
LIST += [btc]
LIST += [aliens]
LIST += [ghost]
LIST += [gngst]
LIST += [mlnm]
LIST += [sharks]
LIST += [utm]

LIST += hampa
LIST += gman80
#END

You can replace [hack],[sharks] etc in [Fish] for example
example

#START
LIST += [Fish]

#END

It mean what programm will find all players who has clan tag only.
Also in [Fish] place you can wrote player nick.
Start BigBro.exe


Sorry my English.