Hi Cindy, yup! You'll want to create a hidden field on your form that is populated with the URL parameter. As long as the link that people are using contains the URL parameter, it will be captured.
Example: www.xyz.com/campaign?source=linkedin and www.xyz.com/campaign?source=emailcampaign
Both of these would go to the same page, but the hidden form would be populated differently based on the source. One note here, if your field is "Source" and you use "source" in the URL, it won't capture. So capitalization matters here.
I'd strongly advise testing to ensure that you're getting the results that you're expecting, but in the long run this will help you to save time.