Erm, not really. I mean, we know a few, but to be honest it’s a bit irrelevant. I can list of the ones I remember though.
Dante Basco - Zutarian, Mae Whitman - Kataang, Grey DeLisle - Kataang, Bryke - Kataang (what, they totally did voices in LOK). And then some of the animators gave away who they shipped, I remember one of them drew a Zutara picture, but then again Studio Mir drew Kataang so it’s odds even there.