Use lists in expressions
Select is in list or is not in list from the Operator drop-down list.
Select a Rules List from the Value drop-down list.
When you are done composing your rule, click Deploy to commit your changes and enable your rule. Click Save as draft if you are not ready to enable the rule.
This expression filters requests from IP addresses that are in a Rules List named office_network:
(ip.src in $office_network)
Note that names for Rules Lists can only include lowercase letters, numbers, and the underscore (