Hi @Tikky,
Welcome to the Auth0 Community!
First, I’d like to point out that you will not be able to use http://localhost/callback as the allowed callback for your production application because this would indicate that your application is locally hosted and only accessible on your local network.
Instead, you might want to consider hosting your application and then using the corresponding URL as the allowed callback in Production.
In regards to using another callback, yes, you can specify the callback URL of your application to the callback URL that you desire.
You may find our Redirect Users explains in further detail the usage of callback URLs helpful.
Please let me know if you have any further questions. I’d be happy to help.
Thank you.