DNS Resolver Access List using Aliases?

[Josho_SAI]

Hi Team
I can't believe this is my first post in the Netgate community forum. I've only been installing and configuring Netgate appliances for about a decade... Still, I suppose there's testament that the Netgate pfSense product works amazingly well!

I'm having to add my first ever DNS Resolver Access List to allow a wan-side subnet the ability to hit the pfSense appliance for name resolution. (Wan-side isn't the internet either, just a client network that hosts my network inside).

Having a quick look at the DNS Resolver Access List, I wasn't able to use a Firewall Alias.

Would I be correct in assuming I'm unable to use a previously defined firewall alias for an allowed subnet to the DNS resolver? It would be great if I could use the firewall alias feature.