I frequently use Lightroom 3.6 for tethered capture on location. If I sign up for Adobe cloud and upgrade to Lightroom 5, do I have to be online all the time to use it? In other words, can I still use the program off-line?
The only difference is the installation method and the ownership verification. The program still is installed on and runs from your local machine. You only have to hook up to the internet every 60-90 days to verify ownership.
From the FAQ
No, the desktop applications in Creative Cloud, such as Photoshop and Illustrator, are installed directly on your computer, so you don’t need an ongoing Internet connection to use them.
An Internet connection is required the first time you install and license your apps, but you can use the apps in offline mode with a valid software license. The desktop apps will attempt to validate your software licenses every 30 days.
Annual members can use the apps for up to 99 days in offline mode. Month-to-month members can use the software for up to 30 days in offline mode."