The condition User is not in project role is not yet available in JWT Cloud, but you can implement it easily using the Jira expression condition.
Create a Jira expression condition
Enter the expression
!user.getProjectRoles(new Project(issue.project.id)).map(p => p.name).includes("PROJECT_ROLE")
where PROJECT_ROLE is the project role that the current user must not be a member of.
If you still have questions, feel free to refer to our support team.