Omni MIDI mapping to controller?

Hi there,

Im relatively new to renoise but not to music trackers.

I am trying to map my AKAI MPK mini to Renoise. I am sequencing a Korg volca Sampler and would like to be able to control the parameters with the rotary knobs. But I would like the same controls to control the selected instrument only. The term is called ‘omni’ in FL Studio. Because the Volca Sample uses a different MIDI channel for each part/track I have set up a new instrument for each part/track. I have 8 rotory knobs onb my controller and would like to be able to control each selected track parameters with them. Is this possible?

Any help would be great.