[kadoban]

In most shitty routers: no. They don't even have raw ability to do that.

You can look around for something like device isolation, but I doubt you'll find it unless you go a couple of steps up from whatever router ISPs ~give away these days.

[0xR1CK]

My ISP's router has isolation. Has had for 5+ years. Main SSID has it off so we can do LAN stuff. Guest SSID is used for IoT things and isolation turned off. Handy.

[olyjohn]

What exactly does it isolate? An SSID? IP addresses? individual MAC addresses? How does this stop a pre-infected device you purchased from shitting traffic out of your network, acting as a residential proxy or try to own your other IoT devices?

[kadoban]

The one I've seen on ~basic consumer routers just disallows wifi devices from talking to each other at all, it won't route between them. I usually need something more nuanced personally, but it's not a bad start at all.