Swap theme for user

<?php
/*
    Plugin Name: Trocar Tema
    Version: 1.0
    Author: brasofilo
    Author URI: http://brasofilo.com
*/

/* Trocar de tema conforme o usuario */
function change_theme( $template = '' ) {
    global $current_user;
    get_currentuserinfo();
    if ( $current_user->user_login === 'SEU-NOME-DE-USUARIO' ) {
        // NOME DO TEMPLATE ALTERNATIVO
        $template = 'twentyten';
    }
    return $template;
}
add_filter('template', 'change_theme');
add_filter('option_template', 'change_theme');
add_filter('option_stylesheet', 'change_theme');