PSVita supports multiple PSN Accounts per system, but only if you have multiple memory cards.

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theprof00 said:

Acevil said:

theprof00 said:

Acevil said:

theprof00 said:
Why do you need multiple accounts? I just don't get it.

To share with family members or roommates. 

Why can't you share with only one?

Well typically why I never share and will never, is because I never want anyone touching my files. I was just answered your question. 

So then you're not really sharing, are you? I'm impressed.

He's sharing the console and games, not the PSN account trophies and save files. Big difference.