please help with routes

I have two different dsl lines comming in to my mikrotik server. I use ver 2.8.26 I have 3 network cards in router. Two for DSL one for local network (192.168.0.0/24)

Gateways are 192.168.0.1 (Public1); and 81.7.82.1 for (Public2)
But when I add gateways in to routes and try to use net. It works only from one DSL line. I want to set that part of my local network users would go out from Public1 other users from Public2.
How do I need to set up routes. I have read manual. I know there is answer but my head doesn’t work so good today. Can someone tell me what I need to do?

have you tried policy Routing ?
http://www.mikrotik.com/docs/ros/2.9/ip/route.content#8.48.3.2

I am on 2.8 version and I tried policy-routing. I have problems with sending data, it’s slow and internet appears and disappears often.

I find out. ip dns doesn’t work. When I try to run connection from 2 internet providers. Any ideas Why did DNS stopped to work?