Muting individual notes

Is possible muting individual MIDI notes on Ardour? I’m using a virtual synth and sometimes I need muting particular notes for try musical options and sometimes these changes don’t work and I need come back to initial change. Now, my workflow is delete and use ctrl+z, but is a bit clunky, because occasionally I start to work and ideas flow and ardour can’t undo infinitely.

Nope. Ardour 5 does not offer this feature.
Perhaps you might be able to work around by changing the MIDI channel or velocity. but that’s perhaps lilkewise clunky.