Nope, because anything after the # isn't included in the HTTP GET request made to the server - so a .htaccess-level redirection won't see it. You have to execute actual JavaScript on the client to read and redirect the #! bit.

That is the fundamental problem with hashbangs: the server receives "GET / HTTP/1.1" and the client uses javascript to render the hashbang. The server has no idea a hashbang is present until after it sends javascript to run client-side.

The redirection has to be done on the client-side, because the server never receives the fragment identifier as part of the URL.