Convert a RGBW LED Controller in a 4 channel led controller programmatical

Hi Guys,

i have a rgbw led controller and want to use each channel separately for 4 different led bulbs.

Unfortunately, you can switch the controller to 4 channel dimmer but then not control all channels separately.

I have 4 lamps over four doors and I want each of them to come on when the corresponding door is opened. Or, for example, 3 lamps when 3 doors are open.

Is there a good way to solve this somehow with automation or Node Red?