Citizens of Australia, the U.S., and Western European countries usually do not require a visa to enter Canada. Citizens of most other countries do. See the official Visiting Canada page for complete visa information, including a list of countries and territories whose citizens require visas in order to enter Canada as visitors.
Please send an email to Azzedine Boukerche, LCN 2008 local arrangements chair, to request additional information and a confirmation letter for visa purposes if one is required. Authors of accepted LCN conference and workshop papers please note that you need to complete the author registration first. Please attach the IEEE registration confirmation with your request for a visa confirmation letter.