Feature Request: Regex on Trusted Host Criteria

We our using a cloud based provider for certain VPN connections and with the number of different gateways, there are about 50 different possible DNS servers from which we would need to add to the Trusted network criteria. It would be much easier if we could do a regex so that something like:
192.168.[10,20,30,40,50].1
could be used instead of the literal values (is there a limit to the number of DNS servers it can check?)