Page 1,060 of Bosc and Gagnon says:
If a member wishes to raise a question of privilege during a committee meeting, or an incident arises in connection with the committee’s proceedings that may constitute a breach of privilege, the committee Chair allows the member to explain the situation. The Chair then determines whether the question raised in fact relates to parliamentary privilege. If the Chair determines that the question does relate to parliamentary privilege, the committee may then consider presenting a report on the question to the House.