Need to report activity on a Subnet

I am using Websesne 7.5 which cannot be upgraded.

I have 2 Subnets, a 192.168.100.x and I have a 172.27.x.x

What I need to know is how to get to the information from the 192.168.100.x (Users and URL's) without the investigative reports generating anything from the 172.27.x.x Subnet. I just want to see what users are going to what URL's from the 192.168.100.x Subnet from the investigative reports. When I tried to narrow it down by doing a search, once I made any other change all of the IP's were listed, I just want to generate a daily report for the 192.168.100.x network based on the Subnet, User and URL and omit any information from the 172.27.x.x Subnet.

Thank you