saw em off said:
Know of any? Not just a guest network, but one I can actually assign different vlans to. The deco I have now has a guest but there's no way to put it on a separate network from my primary ssid. I have a firewall I can create multiple vlans and would like to separate my normal wifi usage from my smart devices. From there I can get granular control over different networks.
Guest network is already isolated by default for decos. You can change the SSID of the guest network. Not sure on the granular control you need after that though.
If you want full non guest network, you want a Tri-Band router which should give you a full extra 5g network. Not sure on sharing blocking between them though, that would depend on the exact model.
https://www.tp-link.com/us/support/faq/1460/