There isn't a built-in mechanism to sync perspectives (or themes), but they implemented the feature in a way that makes it relatively easy to do it yourself. In your home directory, in the Library/Application Support/OmniFocus directory, you'll find a directory called Perspectives (and a corresponding one called Themes) that contains a file for each perspective (or theme) you have defined. You can simply copy those files to your other machine(s) with a USB thumb drive, Dropbox, MobileMe, or whatever preferred means you have for moving files from one machine to another. I think you might have to restart OmniFocus after installing or updating one to get the new version noticed.
There have been past requests for an automated sync facility of some sort to propagate such changes. If you want to add your voice to the chorus, use Help->Send Feedback or email
omnifocus@omnigroup.com to request it.