Questions ,

I have a vigor 2860Ln, I specifically have it so I can use 4G SIM and VDSL at the same time. I use a different device for DHCP within my location. I have PFsense in between my router and devices. PFSense also acts as the DHCP server.

Is it possible to have WAN1 route all traffic out PORT1 and have WAN3 Route all Traffic out PORT3 ??

Just curious what is the best and easiest way to do this ? I have 2 WAN connections on my PFsense and I want to manage how the traffic flows thru PFsense so I need to easily do the above with in VIgor

The DrayTek routers don't do Route Policy / Load Balance rules based on physical ports (unless you configure VLANs), but if the pfSense box was set up with different IP addresses on its WAN interfaces / ports connecting to the DrayTek, the DrayTek router could have Load Balance rules based on Source IP address, which should work for that setup.