What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
To my understanding, you would like to know how you would be able to get the IP Address of the user who submits your form, is that correct? If that is the case, please feel free to follow this link: How-to-See-IP-Addresses-of-Form-Submitters.
But if you want to detect the IP Address of the Form Submitters so that multiple submission can be prevented you can set your Unique Submissions to Strict Check.
Strict Check - uses IP address to prevent multiple submissions and this is a very effective solution to prevent spammers.