/ip firewall address-list add list=for_mask address=192.168.10.0/24
/ip firewall address-list add list=for_mask address=192.168.113.0/24
/ip firewall address-list add list=for_mask address=10.15.0.0/24
и т.д.
/ip firewall nat add chain=srcnat src-address-list=for_mask action=src-nat to-addresses=10.161.44.1 out-interface=ether5