There are methods for creating copy protected DVDs in Standalone DVD towers and in Automated DVD Duplicators, but none work within the Mac OS.
The DVD towers that offer it are the most cost effective, charging you per master created not copies made. The Automated DVD solutions are priced per copy and get to be a bit more expensive, plus you need to commit to a quantity in a bundle of 100, 200, 500 or 1000 copies. Microboards makes it for standalone duplicators. Again though, windows required to drag and drop your VIDEO_TS file through the process.
http://www.mediasupply.com/micro-mcl-30-1.html
Primera, Microboards and Rimage make the per copy protection that work with Automation.
http://www.mediasupply.com/micro-vw-100-1.html
http://www.mediasupply.com/primeraptprotect.html
Microboards is telling me they are working on a Mac version, as they have a great new native Mac software suite, but seems like its a bit off.
The copy protection on these methods is not CSS, but its ideal for wedding videographers and producers of small productions. There's no major hacking movement going on to crack this protection, like there would be on CSS for something like a new IronMan release, so its pretty good. The idea is to keep the people who buy the copy of a wedding video from going out and making 20 copies for all their friends.
If anyone has any input on video protect for Mac single disc or duplicated disc protection let me know.
I hope that helps.