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
adb install now supports --user USER_ID argument, so in order to install APK for a certain user, use:
adb install
--user USER_ID
adb install --user USER_ID PATH_TO_APK
In order to find out USER_ID, use adb shell pm list users.
adb shell pm list users
See https://source.android.com/devices/tech/admin/multi-user-testing for details.