Can I limit what subusers view/can edit?

I have multiple forms, one for each vendor I work with. Can I give them each access to log in but only see their own page?

Yes, you can limit the users and determine which forms they will be able to view the submissions or edit forms/submissions.

For more detailed instructions, follow this link:

https://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User