Yes you do need to be part of the beta program or wait for the public firmware.
If you are good w/ networking you can actually use the original firmware by setting up either all static IP addresses or creating a VLAN for the InfiniTV4 but I wouldn’t recommend it as it is not stable.
Edit: I realize what I said is somewhat contradictory. The guide is only valid for beta program and for the pending public firmware. The current firmware will not have the network configuration section but will have the network bridging dropdown.