I want to create two projects for external clients with complete separation between them. I have been able to find many pages containing explanation how to restrict users from accessing and seeing other projects, but I have yet to find anyone explaining how to configure JIRA so a user is limited to assign an issue only to users of same project.
Currently, a user of a project can assign issues to users that do not have access to project. In fact, in the assign options all the users are listed. This means that a client can see names of accounts of all other clients, which is not acceptable in my setup.
Thank you.