This is currently not possible. The home form or microflow is used both when a user logs in and when a user presses the Home button.
You might be able to use Java to attach some sort of handler to the LoginAction that is triggered when a user logs in. I cannot help you with the specifics though.
If you require this behavior for your project, I suggest filing a feature request.
How about hiding the home button with CSS and adding a Home menu item with a different Microflow?