Complex sentence: Vorlok Drakksteim also has a side project named Black Murder, for which he is the composer, while Wlad Drakksteim is the composer for Vlad Tepes.
Split into simpler sentences: Vorlok Drakksteim also has a side project named Black Murder. He is the composer of that band, while Wlad Drakksteim is the composer for Vlad Tepes.