回複：in canada, want usa green card

You can file employment-based EB1a (people with exceptional ability) or NIW (national interest waiver) when you are in Canada. Or you can find a job in US and ask you employer to sponsor your green card. Or you marry to a US citizen or permanent resident, or have US citizen parents, or have US citizen brother or sister to file family-based immigration. At last, you can try refugee also. All the information can be found at

http://uscis.gov/graphics/services/residency/index.htm

or ask an immigration lawyer.

There is no special treatment for people in Canada or Canadian citizens.