When you create a form as usual by going to “Administration => Forms”, you can enable the matching of a form by page URL, page path or page search query. To track a form from a certain page, click the checkbox “Track interactions in this form for forms found on specific pages, as configured below (not recommended)”. Then only specify page criteria (step 2) in “Track interactions in this form only for forms found on any of these pages (optional)”.

Previous FAQ: Is it complicated to setup the tracking of online forms?