Scan for devices: VLAN support

Hi,
great app, but I'm missing one feature: scan for devices in VLANs.
I usually got in my networks few VLANs. For example - one for core ethernet devices, one for wifi clients, other for iot devices... 
Right now Fing will scan for devices only in VLAN associated with current Wifi network.

For example. In my current network f.e. printer is on 192.168.5.x and my laptop is on 192.168.20.x. There is no way (or I can't find any solution) to force Fing to scan from 192.168.20.x subnet with my printer...
It would be great to have a possibility to add other used IP addresses ranges used in given network...