Contributions to multiple Jam Games

I'm planning to organize a Ludum Dare event in my University. The thing is every person to come will have different skills and skill levels. I was thinking it would be nice, say if a skilled artist to draw some sprites for multiple games, a good programmer to debug multiple games or someone with no experience to generate sfx with bfxr for multiple games. But I can't find the rules regulating involvement with multiple games or submiting multiple entries. I also wonder if it's okay for one to work on their compo game while contrubiting to a jam game. how flexable are the rules