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JotForm Support Manager
I think you can take a look at this guide
Strict Check will control the IP address. However, if IP does not change in a month (some ISP will do it) , then the user will not be able to submit a new one next month.
You might probably set an expiration date and/or a number of submissions limit the form can receive.
Be aware that if you put 1 at the Submission Limit option, that doesn't mean it's one per user, it means the form will get only one submission as a whole total.