I dont think this is what he meant.
When you have auto-updates on, the app basically updates automatically when new version is detected. I have this option off globally.
When you then have updates manual, what you do is you go to Google Play and there you have the list of apps that have updates available. And you can either go to each one and update them one by one, or at the top you can click update all - so the update updates everything, but it is triggered manually. This is what I use all the time.
However in this case, since he does not want just one single app to update at all, during the manual updating he has to go through each one and update each manually.