How to Customize the Candidate Application Form in Career Site with different Job Posting

How to Customize the Candidate Application Form in Career Site with different Job Posting

I have 3 different job postings and all these jobs requires different sets of of questions  or webforms. I found Candidate application form tab in the career site but when I customize it, all jobs will have the same questions and format.

I can create a customize webform but I cannot see where to link it in the Career site and use that webform to a specific job posting. Can you please let me know if this function existing?