Permanent residents are not charged as international students. For example, Queen's University says:
If you are not a Canadian citizen, Permanent Resident (Landed Immigrant), or a person registered as Indigenous within the meaning of the Indian Act, you are charged the international fee (see Undergraduate Tuition Fees - International or Graduate Tuition Fees - International).
It goes on to say:
A number of exemptions may apply to International students. A short description of each of these categories follows. Each of these cases must be examined individually by fee assessment staff in the Office of the University Registrar, in Gordon Hall.
International students who qualify for an exemption are charged domestic fees (see relevant Domestic fees schedule on the Fees section of our website. International students with questions about their fees or payments can contact the Office of the University Registrar by telephone at 613-533-6894 or by fax at 613-533-2068.