Bobert, I suggest you talk to your PSO and enroll into the OPME - DCE 002: Military Law.
Terrific course, you take it at home through RMC's division of continuing studies. There are 6 OPME's altogether if you do not already know, they are university level programmes that last about 3 months a pop that cover everything from Military History, to CF Ethics and the Management / Governmental procedures that control the CF.
The course will give you a very detailed analysis of how the entire Military Law system functions from the bottom-up. And yes, their are jury panels, depending on the type of courts martial elected and the rank of the convicted person.
Some trial systems such as summary trial do not preside in court settings, whereas other types of courts martial (yes, that is the plural form, not court martials) such as general or standing courts martial will look like an episode of JAG. Some others like Disciplinary courts martial will have the convicted in front of the judge pleading his case alone ... scary stuff.
Depending on your rank, and the type of courts martial, you may have a 3 or 5 person jury. An officer will have all jury members of commissioned status. NCM's & NCO's will have 2 or 5 or 1 or 3 panel members a senior NCO of WO or higher.
Hope this helps ... take the course, you'll love it. (Promotion points too for completing all 6) ;D