~x0928 acc central ~8q9ncp.idlk
These files have to do with InDesign's ability to track when a file is open; there's a great thread about it here: <http://indesignsecrets.com/can-i-open-an-indesign-lock-idlk-file.php>
If you're not unix-savvy, search Google for change file permissions on mac os x darwin with terminal, and similar phrases.
Darwin is the name of the OS X flavor of unix.
HTH
Regards,
Peter Gold
KnowHow ProServices