I think it was either ST3 or IT (or both) that had this sort of feature.
When you copy block and put this sort of chord mode on (don’t remember what it was actually called) and start inserting notes, it pastes the whole block and transposes it according to the key you press.
I think it was by default assigned as a C-4 instrument, but if this gets implemented into Renoise you should be able to change the base note.
block you copy:
C-5 01 60 ---- G-5 01 … ---- C-4 03 … ----
turn the chord mode on, press e and renoise pastes this:
E-5 01 60 ---- B-5 01 … ---- E-4 03 … ----