Thanks Kdyer !
Ok, I found that function. My kix version is 3.63.
Do you think is possible to make something like (of course, iīll verify the right sintax later) this ?

Initial=10.197.0.1
Final=10.197.0.254

If (@IPADDRESS0 >=Initial)and(@IPADDRESS0 <=Final) then server=server 1

I looked the manual, but he hasnīt an example.
One more time, thanks.