Can I share editing privileges with another JotForm user?

I'm not sure if I understand your question correctly. Do you want another user to edit your JotForm or it's submissions? If so, yes. It is possible to share the forms with other users by creating sub-account users. Please refer to the guide below that can help you with sharing forms with other users.

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

Hope this information helps! If you are referring to something different or need any further assistance, please let us know. We will be happy to assist.