Can you restrict tickets that customers see in the portal?

[Bree Polk-Bauman]

We are migrating to JSM and want end users to only see the tickets they submit in Jira, and not the old tickets we are migrating from our previous provider.

The migration process automatically links the tickets to the users' accounts based on email address, so we can't prevent it in migration. I am hoping we can change a setting within Jira Service Management to address this.