Yes this can be done using Security Assist and Data Assist.
take a look at the User Level Authentication tutorial in the solution recipe section of the SecurityAssist support page. you can adapt this from the "Users, Power Users, Administrators" example to you needs of having "illustrator and Employer" user types.
In addition to the users table, you would need to have a jobs table.
using DataAssist, you can create pages to view and edit records in the jobs table. You can also create pages for the employers to search and view the users table. You could set the users search pages to only show information for Illustrators.
With SecurityAssist, you can restrict access to the Jobs insert, and update pages to only employers to give them the ability to add jobs.