Expected IP VS Actual IP

I have a saw selector where the operators do just that... select a saw they are working on. I'm trying to find a way to use the actual IP and the one that is expected for that HMI screen to stop an operator from selecting the wrong saw on their screen. I have the tags ready for the actualIP and the ExpectedIP but don't know what the next step would be. What are some good ways to do this?

Just need to use a script transform to create the dropdown list to show only the valid saws (or disable the invalid saws)