Is it possible to hide all service desk users from other jira projects?

[Sravan Chivukula]

We have a jira software and a service desk installed.
we would like to keep both the software-users and service-desk-users separated where none of the service desk users should show under suggestions when selecting a reporter or assignee.

How can we achieve this ?

[Deleted user]

The Assignee and Reporter will work based on below two permissions of the respective Project's permission scheme

Assign Issues: Ability to assign issues to other people.

Assignable User: Users with this permission may be assigned to issues.

so exclude the servicedek users group in JIRA projects. but if someone in both the groups (software-users and service-desk-users), they will have access to both tools.