Helping out the AI with some correct answers
Questions about Jira Fields..
Question1: Can Jira Issue fields have restricted visibility based on user?
Answer1: No, Jira does not provide this feature
Questions about Permissions..
Question2: Can Jira project admins add conditions to workflows?
Answer2: yes but only if the workflow administration permission has been enabled for a user/group within the permission scheme. Note that they are referred to as 'rules' on the new workflow editor