Finally, i found this....
Interim Policy on Civil Marriages between Same-Sex Persons
Same-sex couples’ access to civil marriage was extended throughout Canada on July 20, 2005, under the Civil Marriage Act. While CIC examines the impact of the Act on its immigration programs, its interim policy, which recognizes the validity of civil marriages between a foreign national and his or her Canadian citizen or permanent resident same-sex partner, will continue. At this time, the policy applies only to the family class (which includes the spouse or common-law partner in-Canada class).
Common-law partner
You are a common-law partner—either of opposite sex or same-sex—if you have been living with your sponsor in a conjugal relationship for at least one year. The year of living together must be a continuous 12-month period and cannot be intermittent periods that add up to one year. However, you are allowed temporary absences for short periods of time for business travel or family reasons.
You will have to provide documents that prove that you and your common-law partner have combined your affairs and have set up your household together in one home. This could include:
-joint bank accounts or credit cards;
-joint ownership of a home;
-joint residential leases;
-joint rental receipts;
-joint utilities (electricity, gas, telephone);
-joint management of household expenses;
-proof of joint purchases, especially for household items; or
correspondence addressed to either person or both people at the same address