I would probably use the Location Property Wizard to map an IP Range to a custom property like “Network_Name”, and then use those values to target your fixlet. That has the flexibility of being able to add or modify the network definitions later, and not have to modify your fixlets.
Otherwise, as this is a class-c network, it conveniently fits the format of a “version”, so I’ve seen that used in relevance, as in
Exists addresses whose (it as string as version = version "192.168.1") of adapters of network
For more complex network definitions, this is the subject of a Challenge from a few weeks ago (comparing an IP address to any CIDR subnet definition) at [Answers Posted] Relevance Challenge - IP Address is in which Subnet - February 2020 (but the solutions there are very complex so far).