How to use the IP range of the PCAP?

Hi all,

I try to capture with sockets by referring to the Capture Traffic instructions in the knowledge base below.

https://support.catonetworks.com/hc/en-us/articles/4413265670673-How-to-Capture-Traffic-on-a-Socket

In Packet Syntax Rule, it seems that in range<> can be used as possible_operators, but I don't know how to use this.

Does anyone know how to specify Range?

Thank you.

Takumi Takeuchi