Locating an app by its bundle identifier from the command line
The magic command is:

mdfind kMDItemCFBundleIdentifier = "com.zerotier.ZeroTierOne"


You can determine this by working backwards from mdls foo | grep kMDItemCF

So if you didn't know iPhoto's CF Bundle Identifier:

Mac:~ me$ mdls /Applications/iPhoto.app | grep kMDItemCF
kMDItemCFBundleIdentifier           = "com.apple.iPhoto"