How to Create Multiple Front Pages for different categories of News ?

I'm not entirely sure what you mean, but you might want to look into taxonomy theme. It's a module that lets you change your themes based on taxonomic terms in your url.

Here's one way of doing this:

1. Create a content type called "home-container". Don't add any additional fields. For this purpose, you'll only need the Title field. You'll be using this only as a "container" for blocks with Views content. See Bob's excellent video at: http://mustardseedmedia.com/podcast/episode11

2. Use the "home-container" content type to create a page for every "sub-home" page. In your example, create a separate page named "local", "national", "international" etc.

3. Create a menu link to each of these nodes. i.e. create a menu link to "local", "national" etc.

4. Create a custom template for these "home-container" landing pages. Include only the region variables that you need. I use a 960.gs style template and have a regions called $maincontent1, $maincontent2, and $maincontent3. These represent three columns similar to sites like www.wsj.com and other news sites. I then populate those regions with View blocks.

5. Now the interesting part: You need to modify your template.php file to associate a custom template with a specific content type.

Here's the code. (I got this from some brilliant Drupal coder on Drupal.org post - maybe someone else can find the reference.)

// Allow use of specific template for specific content type:

function phptemplate_preprocess_page(&$variables) {
if ($node = menu_get_object()) {
$variables['node'] = $node;
$suggestions = array();
$template_filename = 'page';
$template_filename = $template_filename . '-' . $variables['node']->type;
$suggestions[] = $template_filename;
$variables['template_files'] = $suggestions;
}
}

6. Finally, create views (blocks) for your "sub-home" content and place them in your regions.

7. To filter and display specific content on each "sub-home" page, you can use a combination of methods including View filters, nodequeue etc. A robust, well-thought-out taxonomy is key.