Remote dimming with an LZW30-SN

Is there any h/w limitation that would not allow adding additional association groups to this switch which provided the same functionality as the LZW31-SN Group 3 & 4 notifications? I.e., sending multilevel notifications on press/hold/release actions.

I have several of these which have no actual loads that are used for scenes (detached relay), and it would be useful to be able to use them for controlled dimming of LZW31-SN devices that have no physical connection. Currently I can obviously tell them directly or through scripting to ramp to on or off, but not controlled ramping such as when performed directly at the switch for the physical load.