For those who (like me) have strong pedantic genes, first off there is no trade in the CAF called "combat medic", there are two medical branch trades Med Tech (for those who have been 'qualified' as PCPs) and Med A (a reserve only trade for those not PCP qualified); and secondly the "CPSO" is applicable only to Ontario. For clarity, "qualified" doesn't mean that there is a continuing need to maintain a license/registration in a Canadian jurisdiction, just that they had successfully completed a recognized training program that leads to registration as a PCP in a province or territory.
Now to your question.
Yes, no, maybe, maybe not, possibly, it depends, whatever, doesn't apply. Even if stationed in Ontario, military physicians can practice without being licensed in Ontario (same holds true for all the other provinces and territories). The caveat to that is they would not "normally" see civilian patients so their ability to work in a civilian hospital, moonlight at a doc in the box or making connections for their post-military second career is severely limited. But that doesn't mean the same practice of 'delegation of controlled acts' is not used for CAF Med Techs/Med As. In fact it is much more stringent and formalized than back in the day when I was 'practicing medicine' without a license.
Though the Med Tech Scope of Practice document included in this 2017 Request for Proposal (for Emergency Medical Advisory Services) is dated from 2014, in the
similar solicitation that was posted last month the same Scope of Practice is referenced and linked (just not viewable as it is a .mil link). Go to page 29 of the following pdf to view MEDICAL TECHNICIAN QUALIFICATION LEVEL THREE - SCOPE OF PRACTICE, 28 MAY 2014 (the QL 5A follows). It should give you a better understanding of how the CAF delegates controlled acts to Med Techs.