Can you pass a hidden field value OR log WHO sent the survey?

Can you pass a hidden field value OR log WHO sent the survey?

Hi there,

We want to use Zoho Surveys as a post-support survey tool where our client services team member will send the link to a user to complete after they have had a support call or ticket answered via an email sent against a Zoho CRM Contact.

We want to match the responses to the agent. We can pass the name of the support tech in a URL variable but then it is easily edited by the customer once the field is populated. So I would like to have the ability to pass a URL variable that creates a hidden survey field value, OR pass the CRM User details who sent them the survey.

Are either of these possible?

Thanks,
Brenden