This is all I've come up with so far.
Rule 2.306 Depositions on Oral Examination
(C) Conduct of Deposition; Examination and Cross-Examination; Manner of
Recording; Objections; Conferring With Deponent.
(1) Examination of Deponent.
(a) The person before whom the deposition is to be taken must put the witness
It seems mildly open to interpretation but my reading is that "before whom" would indicate physical proximity. However, like pretty much anything else in court, if both sides stipulate on the record, it seems like it would be okay. If someone else can come up with a more specific court rule or guideline, that would be good.