You have the option to block individuals who have applied to your job from viewing new Jobs and Shifts that you post
You can block any job applicants from the View Applicants page by clicking Reject. Checking "Block this applicant ..." will prevent the person from viewing any Job or Shifts that you publish.
If you accidentally block someone you can always unblock the applicants from your Settings tab - navigate to Blocked Applicants and click “manage”.
Simply click on the lock icon to the right of the person's name and the option to unblock the applicant will pop up.
To block them from Shifts and through the Shift workflow, check out this article.