Knightrider is correct the app currently can't talk to more then one WM100.
However you can setup more then 1 WM100 if you have a different device running the app connected to that WM100
I have two WM100s running on the same network one controlled with my new phone the other with my old phone.
I believe dave w also has more then one WM100 in his setup using old tablets.
Each WM100 is a separate HUB and maybe configured differently.
Since each is limited to 32 devices you'd now have 64 possible devices controllable via Wi-Fi.