I know you about the relation 1 PS Vita = 1 PSN account = 1 memory card* *Actually, you can swap accounts after restoring the device and all that...
What I am not so sure is if I can download Vita games from a secondary account in my PS3, and then send it to my Vita. In other words:
2 PSN accounts both linked in two PS3 >> Both PS3s can send games to Vita
I know it's a bit confusing but it's also hard as hell to explain. :S