Yes, The Auditors who have only "Auditor" role assigned to their user account in CertifierOS will have access only to audits that are assigned to them via "Team Roles" function directly from the Audit template/Work Order. More information in this wiki article: How to assign roles to an audit (Auditor(s), Reviewer, Decision-Making-Committee) - GLOBALG.A.P. Wiki Site
Auditors who have assigned combined "Auditor (Farm or QMS) & CB Assist" role will have access to extended CertifierOS functionalities (including all CB audits) except to those functionalities that are intended for the Scheme Manager role.
What are the user roles and rights in CertifierOS? - GLOBALG.A.P. Wiki Site