The Constellation Awards are a Canadian fan award, recognizing the best in science fiction and fantasy film and television, with an emphasis on Canadian productions and talent. They are presented at the Polaris sci-fi fan convention.
You can vote by going to the Constellation Awards website. You might have to be Canadian to vote, but the voting is online, so I'm not sure how they enforce it. Maybe by screening your IP address?
If you're curious as to what goes on at the Constellation Awards, here's a clip from their 2009 presentation:
For a behind-the-scenes look at horror film festivals and the festival directors who manage them, see Horror Film Festivals and Awards. This book also includes a directory of over 200 horror film festivals, and a list of festival award winners from dozens of festivals over several decades.