Hi @TechDad83
Thanks for posting in our business forum.
Current routing tables do not work with the VPN routing. So, expected behavior.
What would be the proper name for this feature in WG? I don't think I ever see this feature on WG. If there is no such a feature on WG, I am afraid that it might be hard for us to implement it because the WG is based on the WG official.
Or you mean the Policy Routing for the WG tunnel? This has been added to the request pool and pending for the further evaluation.
I think you should consider ACL instead. At least give it a try now. As a workaround.
After you configure the WG, three VLANs allow you to access the remote site, but you can use ACL which is effective universally. Try the GW ACL by LAN > WAN and use both SRC and DST as IP Group. And define the SRC as you desire (VLAN). DST to be the WG peer interface IP. That should block the access to the WG peer.
Or try the SW ACL if you have a switch. LAN - LAN ACL. Use SRC Network, DST IP Group(WG peer interface IP).