Hi,
Yes, If you can mange to get a skilled job, which is in demand there, you may apply for LMO(Labor market Opinion) through your employer, and get extension on the work permit.
Rather if you do a 2 years course/ 4 sem course, you will be eligible for a max. possible 3 years PGWP (post grad work permit, for international students studying a post secondary course from a recognized Canadian educational institute).
You don't need to HEAR it form anyone. Rather check the official CIC website, and can know in detail about all the rules and procedures. http://www.cic.gc.ca/english/
Regards.
***All opinions expressed are purely personal, and pieces of information mentioned are to the best of my knowledge... You should consult other sources too.