I was mainly addressing the chukka-chukka thing where you play a chord and immediately choke it off by releasing the fretting fingers. I’ll add that the release is just enough to stop the chord from ringing and is invisible. You don’t release enough for your fingers to visibly lift.
But it sounds like maybe you meant muting the notes you’re not playing. Honestly I don’t think about that at all, it just happens automatically. I did work on it for distorted lead playing in the past and I think it just carried over. It’s much easier in this context because the tone I use for that stuff isn’t very dirty.
But I must be doing something because I often I play that stuff with some heavy skank, and and the muted notes add some nice grit. I’ll try to observe myself a bit to see what my hands are doing. I’ll post again if I notice anything that might be helpful.
I’m not Cory Wong, and you have no reason to emulate me. But I do spend the vast majority of my playing time on funk/soul/R&B for the last few years, so I’ve played a lot of this sort of thing.