PaperCut Software has just finished their first version of PaperCut NG for OS X Server. The Mac version has all the functionally of the Windows edition including, print quota, print monitoring, shared accounts, release station and rule based filtering of print jobs. The system works by hooking into CUPS.
Details of the Mac version are available at:
The software is currently in a public preview period and the developers are keen to get feedback from Mac server administrators, particularly those working in schools and higher education.
A bit more information can be found on the developer’s web log.