As I read it, the protocol will not, in and of itself, require internet access. The IP connection could be to a LAN only, and the devices could then receive instructions from another device on the LAN. However, whether the manufacturers choose to let you do that is up to them. They could easily require a connection to the internet in order for the devices to pay any attention to commands and you couldn't do much about it. Still, if this gets implemented, there will probably be at least a few devices that don't require access online to be remote-controlable.