Dual LAN with Separate PPPoE

Hi all,

I’m not entirely sure the best way to explain this, but I’m trying to do something similar to this guy: http://forum.mikrotik.com/t/lan-users-multiple-pppoe-gateways/62449/1

The below image should help:
m1.png
What I need is two separate PPPoE connections going down the same physical WAN. From here I need a separate LAN port for each PPPoE connection (kindof the opposite of failover) - essentially to run two customers on one MikroTik.

Does anyone have any ideas on the best way to do this? I’ve been playing around with mangle but I couldn’t get it to behave correctly - I also tried MetaRouter and didn’t get far but that’s probably not the most ideal solution anyway.

Thanks!