Celoxis provides a multi level security on Reports. You can control

Who creates reports:
This is controlled by the Add Report privilege. You need to grant this privilege to a role who should be able to create reports in Celoxis.

Who accesses reports:
When a report is created, there is a Visible to Users option. You can either create a private report (not shared with anyone), or choose to share it with all users in a Specific workspace, or share it with all users in your organization.

What data is visible on the reports
Finally, when the report displays data, the information has its own security layer. For e.g. if a user does not have View Financials privilege, and such a user accesses a report which contains financial information, then that user will see '*' in those columns. Similarly, if a user has privileges to see only his/her own tasks, then the 'All Tasks' report will show only the tasks assigned to that user.

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