Thanks for the hint. I don't think that after what I figured out today, Apple Home will be "my thing". Of course I could setup "something" in IoT VLAN which connects to Home and I can connect from iPhone in another VLAN, but if I didnt do it wrong, it always uses the internet to execute commands, means:
Iphone Home App --> Internet --> control server --> back home --> iPad --> IoT devices
I can clearly see a delay from pushing the button in Home App and when I sniff on the interfaces I can see outoing and incoming connections.
What I'm curious about, except some avahi/mdns/zeroconf stuff there is nothing I could do to keep it local when iPhone is on user WLAN/VLAN while hue bridge is still in IoT VLAN ? Thats where my network skills leave me alone.
You might also check FHEM if you didnt already.