[NoCat] Splashing different pages to different users

[Marco Filippetti]

Hello my friends,
 
My question would be... knowing the IP addresses of my network users, is it
possible to serve different splash pages to different users, based solely on
the IP address they have? For instance, an user has the IP 10.10.10.10,
whereas another user has the IP 20.20.20.20 (2 different networks). Can I
serve a splash page for network 10.0.0.0, and another splash for network
20.0.0.0? How to implement it??? Anyone? TKS!!!  
 
.Marco