Can I limit responses for certain sections of a form?

I am trying to create a sign up sheet for an event and limit responses for certain sections. There are only a few spaces available for each job. If the spaces available fill up, is there a way to notify the user that this particular job is full, and ask them to please choose another job?

You can use some widgets that have limited places like Gift registry:

http://widgets.jotform.com/widget/gift_registry 

demo form:

http://form.jotformpro.com/form/51301543278955? 

Or Ticket purchases:

http://widgets.jotform.com/widget/ticket_purchases 

Demo form:

http://form.jotformpro.com/form/41532262484957 

Let us know if we can assist you further.