I cleared off my discussion on the dialogue because I felt it would get too complicated. Also what proof do you have, aside from an idea of where its coming from when, in reality, you don't know which side of the portal is being seen. Thats about it. You still haven't named anyone who fits the description, so until you do, you can't outright exclude him. Plus they make no mention of Jacqui when they arrive, only Cassie. Can you prove they knew who she was ahead of time, by chance? I'd assume not.
How would he know? If he was sent to retrieve Cassie, and Jacqui happened to be there by chance (which more or less seems to be the case as they had no reason to expect her there) then how would he recognize her? If you are going to insist he was briefed on her before, I'll need a reason why since up until this point neither Jax nor Jacqui have been present in the plot or around Erron in any sort of way. I await your responses insisting that yet another plot hole exists because of "continuity errors" (by the by, Mileena's eyes changing wasn't a continuity error, it was an artist swap).
It has to be one of four people: Erron, Jarek, Tiana, or Kano.
Out of those four, Kano is the only one we can logically assume knows who Jacqui Briggs is to the point of being able to recognize her when she wasn't expected to be there.