Your filter is actually pretty close, take the auth filter for example:

Route::filter('auth', function()
{
  if (Auth::guest()) return Redirect::guest('login');
});

Here we see the auth filter checking if the user is a guest or not, and if true, the filter redirects the user to a 'login' page.

We can add filter with similar logic to achieve what you want.

Route::filter('<whatever filter name here>', function()
{
  if (Auth::guest())
  { 
      return Redirect::action('PagesController@home');
  }else {
      return Redirect::action('DashController@index');
  }
});

Let me know if this helps.

I had the same issue and solved it using a ternary. In one view I also had to set some variables, which previously had been part of the extend, so I just moved it up.

<?php
$title = 'FAQ';
$active_menu_item =  'FAQ';
?>
@extends(Auth::user() ? 'layouts.app' : 'layouts.main')