Multiple quests per NPC

[cavedude]

I am working on creating all the starting quests in Rivervale and I have run into a small problem. Many of the NPCs give out multiple quests and will remember your progress. Meaning, you get a quest from a NPC, complete it, go back to him, and he gives you a new one. Somebody else who had never been to this NPC before would of course get the first quest. How could I do this using our Perl system? Would it be done with globals? Thanks for any help.