Yes, GoControl Z-Wave Plug-in Dimmer Module (PD300Z-2) support the Protection Command. There are three protection mode and with this module you will be able to set any one of the three Protection modes using a Z-Wave Controller. And only certain settings would be possible by some controllers. Apart from the Protection setting, you will find the module to be operating normally.
No Protection means when the unit would work normally, like the dimmer would turn on and off when the button is pressed.
Child Protection means as you can control the attached load by pressing the button on the module thrice rapidly.
Button Disabled means you cannot use the button to turn the attached load on or off. But you will be able to access the Z-Wave network.