If a subject did a hardship withdrwal a few months back. Can they get a loan on their regular loan once it is paid out?

Depends on the terms of your employer's plan. Most plans allow you to take a loan on up to 50% of the account balance, but many plans set restrictions such as placing a ceiling on the loan amount. Talk to your HR department or to the 401(k) plan administrator - I'm sure they can answer your question.