There are at least two artists using the name Bwana.
1) Bwana (Nathan Micay) is a young Canadian electronic music producer currently living in Leeds, United Kingdom. He released his debut EP "Over & Done" in 2012
2) Bwana are a psychedelic-funk-jazz-rock band from Nicaragua circa 1970-1972. Lots of Latin percussion, acid rock guitar, jammin' organ. Spanish language vocals for the most part, although actually the majority of this consists of instrumental grooves.