Configuring static route

Thank you for your reply. So if I understand, 1.) There isn't a way to create static routes that will allow me to share specific devices on my 192.168.1.0/24 with devices on 192.168.2.0/24 and 192.168.4.0/24, but not the 192.168.3.0/24. 2) Any VLAN with Inter VLAN Routing enabled will allow access from all VLANs without restriction. 3) Client isolation is only for WiFi connected clients and not wired connections. What if I put my 'Internet of Things' VLAN in the DMZ, then put something like a Sophos UTM home edition between my internet router and the FVS318N? Would that hide my internal network from the IOT devices?