How to use `adb` to install development apps for one user only?

Question

Android 4.2 on tablets added support for multiple users per device (similar to desktop OSes), each of which can install and remove apps independently. Currently, using

Answer 1

It may not have a per-user 'adb install', but it does have a per-user 'start' option when you want actual run the APK for testing. By default the documentation says 'start' will just start for the currently running user, but you can do

adb shell am start --user USER activity...

to start the APK as someone else. To get a list of users, run

adb shell pm list users