Hi jundi49,
I'm on a train heading back home. I'll be glad to post some screenshots on how to set that up tomorrow from the my office.
Meen while, what games are you going to play? You'll have to setup outgoing rules from the LAN interface (or whatever IF the connection is being originated from) and select different GATEWAYS depending on the destination IP & PORT.
Example:
Src: LAN Subnet.
Src Port: ANY
Dst: ANY
Dst Port: 80 /443.
GW: Web browsing gateway. (aca GW1)
Src: LAN Subnet.
Src Port: ANY
Dst: Gaming Server IP
Dst Port: ANY
GW: Gaming gateway. (aca GW2)
This would send web traffic through GW1 and gaming traffic through GW2.
Maybe it sounds a little fussy but it's not hard at all. As soon as I can, I'll post a couple of images you'll understand right away. (If you haven't already.)
Regards,
Joel.