Would be great, if everybody who uses some LOCKING & BLOCKING Mods could share them here 8)
Have you looked at the mod site? click here (http://custom.simplemachines.org/mods/?language=english-utf8)
Locking threads? Locking database tables? Locking file handles?
Blocking spammers? Blocking general pain users?
I know it's hard for me in particular to understand you because I don't have mind reading skills, but maybe you could be a little more detailed for us to be able to help you.