How To Create User Specific Admin User Pages?

You can add a new page using add_(sub)menu_page();. WordPress is pretty kind in this case and offers tons of hooks, filters and higher level API functions that help you going around this.

Let’s just use add_users_page(); and hook into admin_menu.

Example plugin

It adds an admin page that has the user_login as slug.

Simply drop this into your plugins folder and give it a test to see if this is what you’re looking for.

<?php
! defined( 'ABSPATH' ) AND exit;
/* Plugin Name: (#66004) »kaiser« Add private User admin page */

// Add the admin page
function wpse66004_add_users_page()
{
    global $current_user;

    add_users_page(
        // $page_title
         'Your data'
        // $menu_title
        ,'Private Page'
        // $capability
        ,'read'
        // $menu_slug
        ,$current_user->user_login
        ,'wpse66004_render_users_page'
    );
}
add_action( 'admin_menu', 'wpse66004_add_users_page' );

// Render the users private admin page
function wpse66004_render_users_page()
{
    global $current_user;

    if ( ! current_user_can( 'read', $current_user->ID ) )
        return;

    echo "<h1>Hello World!</h1><p>And, of course, hello {$current_user->display_name} too!</p>";
}