I want to setup my client as a user who can only view and edit Form Results. How can I do this?
Did you check Permission documentation on site?
Further, If not achievable you have to go with custom solution.
Here are two tutorials where users are limited to certain sections of a Concrete site:
- Permissions for editors in a multilingual site :: Concrete CMS
- Basic Workflow Full Working Example :: Concrete CMS
You would do something similar, but limit that user or group to the Reports > Form Results section of the Dashboard.