I know that a PSN Account is tied to the memory card which means if you wanted a NTSC (US) and PAL (UK, Aus) PSN Account you would need 2 memory cards.
With that said, in terms of trophies, can you sync trophies that were obtained from an NTSC game with a PAL PSN Account? Here's an example:
I have Atelier Totori Plus on my Australian PSN Account (PAL). If I were to get a NTSC copy of Ragnarok Oddysey and got its trophies, could I sync them to the same account as my PAL PSN Account or can I only sync it with the NTSC Account that I would use to get its DLC?
EDIT: I should note that in my example Ragnarok Oddysey is preferably a physical copy, not downloaded.