There is more than one artist with this name:

1) Formed in 2003, Lockdown from New York play a hard brand of NYHC. Lockdown is Eric Roi (Lead Vox) (ex-Bile), Jeff Lombard-i (Guitar & Lead Vox) (ex-Bile, Napalm), Nicky X (Guitar) (ex-Cro-Mags), Ivan Gonzalez (Bass) and Doug Bohn (Drums) (ex-Bile, Suffocation). Lockdown's debut album American Made was produced by Billy & Danny of Biohazard.
http://www.myspace.com/5733820