Check out these links

UNIFOR

http://www.unifor.org/en

The Winnipeg Labour Council:

http://www.winnipeglabour.ca

The Manitoba Federation of Labour:

http://www.mfl.ca

The Working Families of Manitoba:

http://www.workingfamiliesmanitoba.ca

The Canadian Labour Congress:

http://www.canadianlabour.ca

Community Services:

http://www.mb.211.ca