FWIW - my assumption is that SKIP is treated as temporary and can be undone via the radio via the RESTORE SKIPPED menu option while LOCKOUT is a more permanent thing (for use with things like encrypted talkgroups you just don't want to hear - ever).
Having said that, I would expect that they both work the same when it comes to the Wildcard object.... If they don't, it's probably a bug or oversight.
Future PSR-900 user...(still hoping!)
PSR-800 x 2 | PSR-500
BCD-396T | BC-296D (voice) | BC-245XLT (mTrunker) | BC-600XLT | BC-IV | VX-8R
Not a Radio Shack fan.....