Why not request to increase your MAC addresses to 3? You should be able to justify that to your corp admins.
And I would expect that you cannot configure your VM to have the same MAC address as your NIC as that would become a conflict on the ethernet network.
And since your Mac Pro has two NICs, then plug in both NICs (to two different wall jacks), and bind one VM to each NIC so that each port only has 2 MACs visible. (unless you've put in a switch on your desk, and only have one link to the wall.... in which case we're back to asking for 3 MAC addresses for your network drop and don't worry about the 2 NIC thing.)