There are two possible ways to do this:
1. If the changes are to be implemented on all public projects, then removing the 'Issue
tracking - Query' permission from the domain role 'Registered User' is ideal.
2. If you wish to implement this for a single project, you can follow these steps:
- Make the project private
- Create a new role with these permissions:
- Project - View
- Project Page - View
- Project Content - View
- Project Issue Tracking - Submit
- Assign it to the special user group 'Domain Users'. The project will be visible to
all domain users, but the registered user permissions will not get added to the
project permissions.