Is it possible to assign two virtual MAC to few VDOMs?

I have 10 VDOMs and want to assign one VMAC to 5 VDOMs and VMAC2 to other 5. So that when they communicate with internet firewall it appears to be a different firewall.

Also, if that's possible then how can I make VMAC1 VDOMs communicate with VMAC2 Vdoms?

Thanks,

Kevin