Limit submissions based on unique question

How do i limit submission (need only 1 submission) for a form containing automatically populated fields via url.

https://form.jotformeu.com/61566747574368?identifier={inquiryNumber}&projectDeadline[day]={deadlinecet:day}&projectDeadline[month]={deadlinecet:month}&projectDeadline[year]={deadlinecet:year}&projectDeadline[hour]={deadlinecet:hour}&projectDeadline[min]={deadlinecet:min}&intercomLink5={intercomLink5}&budgetestimate15={budgetestimate}&projectTitle={inquirynumber}-{URLENCODE:projectTitle}&projectDescription={URLENCODE:projectDescription9}&filesReceived10=

So each time this form is filled and submitted : https://form.jotformeu.com/61528141447353 , the above will have a different value - this is posted in a place where several people can pick it up. I want to have it first come first served, so after its submitted to not allow anyone else to do it.

Hope this makes sense. 

We have different ways on limiting the submissions. I believe what you need is this one: How-to-set-Form-Limits-Based-on-a-Unique-Question. This function will only allow 1 answer on that specific field.

Related guides:
How-to-limit-submissions-in-a-form
How-to-Set-Unique-Submissions-on-a-Form

Hope that helps. Thank you.