Making a client page

For the client role, use this;

    // Add a client user role

    $result = add_role( 'client', __(

    'Client' ),

    array(

        'read' => true, // true allows this capability
        'edit_posts' => false, // Allows user to edit their own posts
        'edit_pages' => false, // Allows user to edit pages
        'edit_others_posts' => false, // Allows user to edit others posts not just their own
        'create_posts' => false, // Allows user to create new posts
        'manage_categories' => false, // Allows user to manage post categories
        'publish_posts' => false, // Allows the user to publish, otherwise posts stays in draft mode
        'edit_themes' => false, // false denies this capability. User can’t edit your theme
        'install_plugins' => false, // User cant add new plugins
        'update_plugin' => false, // User can’t update any plugins
        'update_core' => false // user cant perform core updates

    )

);

and then use the code above to redirect the login if, and only if, it’s a client role.

One the page template Client Page put this before get_header():

$current_user = wp_get_current_user();
$client = $current_user->user_login;
$slug = get_post_field( 'post_name', get_post() );
$client = strtolower($client);
if ($client != $slug) {
    header("Location: /index.php");
}

and, obviously, we need to let admins see the page;

if (!current_user_can('administrator')) {
    $current_user = wp_get_current_user();
    $client = $current_user->user_login;
    $slug = get_post_field( 'post_name', get_post() );
    $client = strtolower($client);
    if ($client != $slug) {
        header("Location: /index.php");
    }
}