cisco like sub interfaces on mikrotik for traffic segregatio

hello folks

I have many PoPs using different types of radio depending on needs and location.

I would like to segregate customers traffic doing interconnexion via my different PoPs or internet.

I though of vlans but am confronted to a problem. My AP (non mikrotik) connects on a single Port ether3 of my Mkt router, all other CPE of my customers connects to my AP. Each customer should be assigned a different VLAN as access port on my router. I know with sub interfaces mapped to a single interface the issue can be resolved.

how can this be achieved?

Is there any other experience in segregating customers trafic giving priority to Layer2 technologies?

thanks for assistance

Any help around

Would like to know if virtual interface can solve the issue.

regards