I’m currently having to create multiple rules for each device for essentially doing the same thing, which is blocking WAN access. Is there currently a way to have one firewall rule → multiple devices(i.e multiple MAC/IP addresses)?
I believe you should be able to at least put the IP addresses in a firewall group and then select that to be the source in the firewall rule
On top of that, something to do might be to put all the devices that don’t need WAN access in a separate vlan/subnet. Then the whole subnet could be blocked 
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