The only way to do this in Meraki is with ACL's. That said, they're pretty simple to setup. Depending on what works best for your scenario you can apply them via SSID, Vlan, Group Policy. The below doc might be a useful reference https://documentation.meraki.com/MR/WiFi_Basics_and_Best_Practices/Configuring_Simple_Guest_and_Internal_Wireless_Networks
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