yes it is possible. You should create two different LoginControllers with assigned routes, create two different Auth middleware and probably also change RedirectIfAuthenticated middleware a little bit.
In both LoginControllers you should define you guard like so:
protected function guard()
{
return Auth::guard('admin');
}
And if you want to separete routes for your guards than also in RedirectIfAuthenticated Middleware you shold define redirections for both guards
public function handle($request, Closure $next, $guard = null)
{
if (Auth::guard($guard)->check()) {
if($guard == 'admin') return redirect('/admin');
return redirect('/');
}
return $next($request);
}