Preventing Submission and similar of

Hi hope you can help me. I have data mining website and all is getting well as I have prevented the duplicate submission based ok this tutorial https://cfdbplugin.com/?page_id=904. I just tweak it a bit so that it will accurate on the specific functions that we have. The question is how can I prevent submission of similar datas. Example they submit https://www.website.com and prevent to submit also not only duplicates but other urls or similar urls like https://www.website.com/url or others. Heres the website: https://yourpageserver.com/DataMining/