You want to create a filter using SQL that will allow you to filter based on an IP address range.
If the desire to filter on IP address range is based on the last segment of the IP address, then this is a simple approach.
The following SQL can be used to achieve this desired result of only showing computers that have an IP address between 192.168.1.25 and 192.168.1.30. Adjust accordingly to your needs.
where [IP Address] between '172.16.1.25' and '172.16.1.30'
Another option, as noted in How to create a custom report in Inventory Solution "For IP Address, select AeX AC TCPIP table, set the condition (LIKE) 192.168.42.%. All computers with IP Addresses with 192.168.42.xxx in them will be returned."
where [IP Address] like '172.16.42.%'
All computers with IP Addresses 172.16.42.xxx in them will be returned.