When doing a discovery of the network for monitorable hosts, we can already use the host IP as a condition to take action.
However, I would like to be able to do string matching ("like", "not like", "=", etc.) on the returned reverse DNS name as well.

This name is already used and returned in the discovery proces, as it is visible in the 'Monitoring -> Discovery' screen and it is used as the hostname for autodiscovered hosts.