2 LAN Mikrotik 1 Access Point

How to make 2 LAN Mikrotik using single / 1 Access Point?
Mikrotik configuration is using mark-routing with specified below.
WAN 1 using : ether2
WAN 2 using : ether3
LAN 1 : 192.168.88.0/24 routing with WAN 1 using : ether4
LAN 2 : 192.168.99.0/24 routing with WAN 2 using : ether5
Should i use one of my LAN Subnet for given Access Point Address?