Modifying Wordpress JobCareer theme to hide/display users profile details

General information for the website: I am using the JobCareer WP theme to list Candidate profiles for Employers to view, the Candidate profiles need to have their surname (and other identifying fields) hidden from the Employer user-type unless two additional criteria are met.
Kind of development: Customization of existing website
Description of every page/module: I am using the JobCareer WP theme to list Candidate profiles for Employers to view, the Candidate profiles need to have their surname (and other identifying fields) hidden from the Employer user-type unless two additional criteria are met.
1. the Employer has posted a Job (the job posts are free and will be approved by the site Administrator)
2. The Candidate can register a basic, free account and complete their profile, but this profile will not be visible on the site (to any user except the Administrator) until they have paid a fee via PayPal.

All Employers can browse Candidate profiles (posted by the candidates who’ve paid to be visible) but only Employers who’ve posted a job can see the surname and contact details of the Candidates.
Description of requirements/features: The Theme allows form fields to be created on the Candidate and Employer profiles. I need to be able to mark the fields that are allowed to be visible/hidden. I also need to provide notes on these fields for the Candidate and Employer for them to understand that these fields will be hidden/visible based on the established criteria.

Ideally email addresses and tel numbers will be detectable if they are accidentally included in any description/text box fields.
Extra notes: