Create a new automation rule in your project to set the security level to developer when ticket is created.
Update the security level of the ticket when the ticket is moved to in progress status, it should be assigned to tester security level
when closing the ticket it should be assigned to myself(Karthik), if the resolution of the ticket is "Not a bug". In all other resolution it should be assigned to the project owners(Yourself).
Note: We can try in any Automations, Post functions, Validations etc;
Could you please help in this