Thank you so much.
You asked to what extent satellites are the exception, and I think there is something different in the sense that the services they provide are not geographically limited. If Canada provides a lab or even sends over some explicitly military equipment, of course, that equipment itself, in the course of warfare, becomes a target, but it's less likely that Canadian soil becomes a target.
Satellites that are in space are beyond national jurisdiction, and the services they're providing are not just within the geographical limitations of one country or one area. They're global...or they're international, in any case. On the fact that they are dual use, under the laws of armed conflict, you can only target a military object. You cannot target a civilian object, but if something is providing services for both military and civilian purposes, it probably is a legitimate target.
The next question that has to be asked, though, is this: What is the proportionality of the means of interfering with that service, and what are the implications then going to be for civilians? That's the whole point of the laws of armed conflict.