How to block users from accessing each other on a hotspot in RB1100

RouterOS Beginner Basics
1

Hi All,

We are trying to setup a wi-fi network with RB1100 as our hotspot controller. But the APs with client are old non Mikrotik APs.
We only want people on the hotspots to be able to browse internet and do their stuff, but don’t want them to be accessing each other’s devices on the WLAN. How can this be done?

Thanks.