I have an Er605 router managed by Omada controller 0C200

I have 5 usable WAN IP Addresses. lets say x.x.x.2 - x.x.x.6.
Router setup as x.x.x.2 / 255.255.255.248 / GW x.x.x.1

I need x.x.x.2 to NAT to one device and 
I need x.x.x.3 to NAT to another device

Can the ER605 managed by the OC200 handle multiple external IP addresses?

Is aware of addresses x.x.x.3, 4, 5 and 6?

I can router x.x.x.2 traffice Routed/Nated over to one device, but how do i do the x.x.x.3, 4, 5 address to anther device?

It seems odd that the router can be setup to handle multiple WAN ip addresses provided from IP provider, but i am only able to use 1 IP address in the router.