Any representation that the member of Parliament wants to make will have to be made through the person or through the person's counsel. Today, I understand that members of Parliament will be in touch with the PRRA office, but they do not speak directly with the individual decision-makers on cases. So certainly any information that a member of Parliament has can be put before the decision-maker, but it will be done in accordance with the rules of the Immigration and Refugee Board.
Evidence of meeting #23 for Citizenship and Immigration in the 40th Parliament, 3rd Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was clause.
A recording is available from Parliament.