Sure, that’s possible. Are you including the GA-code anywhere on your site today? If not, you can add the following code to your theme’s functions.php-file:
add_action('wp_head', 'add_google_analytics');
function add_google_analytics(){
global $post;
if (is_page('page1')){ ?>
<!-- Analytics code #1 -->
<?php } else if (is_page('page2')) { ?>
<!-- Analytics code #2 -->
<?php } else { ?>
<!-- Analytics code #3 -->
<?php }
}