How to create multiple web-proxy on multiple gateways

RouterOS Beginner Basics
1

Hi, is it possible to create web proxy for each gateway?

I have two interfaces connected to Internet.
Say WAN1 and WAN2.
How to create two web proxy services with port 8080 and 8081, and then redirect the data from 8080 to WAN1, and redirect the data from 8081 to WAN2 ?

Thanks.