Is it possible to add fields to a Google Form which are visible only to specific users (based on their email ID)? Or allow only users whose email IDs fall in a set to fill the fields?
You can select a range of cells, then go to Tools > Protect Sheet...
Review settings, hit "Set permissions", Select "Custom..." and add the email addresses of the people who you'd like to have access.
It'll make the said sheet/range of cells non-editable for everybody else, still not hidden though.