There is one more very interesting feature that has landed with Build 10149. Private notifications are here now on Windows too. So, you can go to Settings–>Notifications & Actions and set “notifications private on the lock screen” for the app you desire. Once you have toggle on this option all the notifications from the app in question will appear as private notifications on the lock screen and in action center.
Catch all our Build 10149 coverage by clicking here and all our Windows 10 Mobile coverage at our dedicated page.