Submission form and specific categories

Hello;

I've a question about the submission form.

In fact, I want to allow users to submit in specific categories. People can choose all categories (so it can be a huge list).

I have several forms and each one must have merely several categories.

Thank you.

hello on link soumission your can use specific categories ! do one link for one type of user
maybe you can use flexiaccess for more powerfull
regards