MikroTik RouterOS v2.9 Reference Manual page 150

Configuration of the IP addresses:
[admin@PB-Router] ip address> print
Flags: X - disabled, I - invalid, D - dynamic
# ADDRESS
0 192.168.0.1/24
1 192.168.1.1/24
2 10.0.0.7/24
[admin@PB-Router] ip address>
To achieve the described result, follow these configuration steps:
1. Mark packets from network 192.168.0.0/24 with a new-routing-mark=net1, and packets from
network 192.168.1.0/24 with a new-routing-mark=net2:
[admin@PB-Router] ip firewall mangle> add src-address=192.168.0.0/24 \
\... action=mark-routing new-routing-mark=net1 chain=prerouting
[admin@PB-Router] ip firewall mangle> add src-address=192.168.1.0/24 \
\... action=mark-routing new-routing-mark=net2 chain=prerouting
[admin@PB-Router] ip firewall mangle> print
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NETWORK BROADCAST
192.168.0.0 192.168.0.255
192.168.1.0 192.168.1.255
10.0.0.0 10.0.0.255
INTERFACE
Local1
Local2
Public