I couldn't tell you what kinds of communications there are between these two offices.
What I do know is that there's some communication between Parliament's protocol office and the Prime Minister's Office when these events come up. That said, the Prime Minister's Office never shared with us its guest list for the event in Toronto. That was really an entirely separate thing. We weren't at all aware what kind of guests there would be, nor of the possibility that some guests might appear on more than one guest list. Only when the Speakers of both Houses are invited are we involved in any way. Then we notify their respective offices. That said, we're not at all involved in the process related to the other guests.