MAC Filtering Block TTL

Dear all,
Hope you will be fine. I need your help
I’m running a hotspot server with multi-vendor routers (Linksys, Cisco, ZTE ). People are sharing my internet with WiFi Scanning.
Now I want to enable MAC Filtering on the LAN port and disable the hotspot server. Every user connects with their MAC.
So MAC Filtering will stop sharing wifi from one device to another

MAC FilterLimit TTL to one device or not?

Thanks & Regards

You still see only one MAC, the “Tethering” device do all the works and you can not do nothing.