isolate wireless hotspot's or wlan's in general

question1…I’ve heard of doing a firewall setting for isolation on wireless ap’s that are attached to a tower with a station, but I don’t know how t do it! can someone write a script for a dumb person here plz?

question2…hotspot ap’s from my understanding…if you set ARP on the interface of a hotspot to reply only and put your dhcp to dynamic instead of static boot it will isolate the wlan’s…is that true

any one