There are multiple artists with this name:

1. Lumberjack is a death metal band from Marseille, France formed in 2007. Check their Myspace page: http://www.myspace.com/lumberjack13

2. Lumberjack is some DJ / producer who also happens to work for Last.fm under the same name

3. Lumberjack is a Canadian band

4. Lumberjack was A former Texas, now Bostonian Chillwave/lo-fi Artist also known as Steven Salazar
http://www.lumberjacknow.bandcamp.com/
soundcloud.com/lumberjackjams

5. Lumberjack is a stoner/spack rock band from Russia. Find their music on their Bandcamp. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.