Submission in more than one category

I maintain a discussion board that is quite popular and which has threads on a variety of topics. My site is already listed in Dmoz in a particular category.

I would like to know if it is ok to submit a different url (of my site) in a different category.

Eg. abc.com (Just for the sake of example)

News section -> Already listed in USA -> News (www.abc.com/news)
US Open Tennis section -> Can I submit it in tennis tournaments section? (www.abc.com/usopentennis)

Might be, might not. Sorry, but without knowing which site we are talking about, the question is impossible to answer.

>> I maintain a discussion board that is quite popular and which has threads on a variety of topics. My site is already listed in Dmoz in a particular category.

We don't list individual threads, if that's what you're thinking of submitting.