I have a complicated network setup on my Mac, with different requests being sent to different networks. Is there any way to tell Windows to just "use what I already set up on the Mac" in terms of which request goes over which network? Or do I have to set up a separate routing table inside Windows (which I'm not sure it can even do)?
Hello ChrisC4, A virtual machine can use three different networking modes to communicate with the world: Bridged, Shared and Host-Only. Please refer to this link to learn more about the Networking modes in Parallels Desktop.
If you configure vm in shared mode, then Parallels virtual router will behave like NAT. after packet reaches Mac, Mac route table will be applied. Obviously, other network resources will not be able to communicate with VM. If you want that, switch to bridged mode and configure routes manually.