A function that will redirect users based on their PMPro membership level during confirmation.

redirect-for-confirmation.php

<?php
/**
 * The function some_kind_of_pmpro_redirection is an arbitrary name given to the
 * function created to run this specific bit of code. You can name it anything
 *  meaningful that you like, assuming that it is unique to the code on the site.
 *
 * The name of the filter hook, however, is not arbitrary as this is something
 * created by the PMPro plugin. In this case, pmpro_confirmation_url, tells
 * WordPress when to run this code in the some_kind_of_pmpro_redirection function.
 *
 * For this to run properly, WordPress requires that you have 3 arguments specified:
 * the URL the user will be directed to, the URL the user is coming from and the
 * logged in user's data. PMPro alters this in the context of membership revealing:
 *
 * @param  string $return_url   the URL the user will be directed to
 * @param  string $user_id      the ID of the current user
 * @param  string $pmpro_level  the ID of the current user's level
 * @return string    the URL the user will be directed to adjusted for appropriate level
 */
function some_kind_of_pmpro_redirection( $return_url, $user_id, $pmpro_level ) {

	if ( pmpro_hasMembershipLevel( 1 ) ) {

		$return_url = home_url( 'page-name-for-level-1' );

	} elseif ( pmpro_hasMembershipLevel( 2 ) ) {

		$return_url = home_url( 'page-name-for-level-2' );

	} elseif ( pmpro_hasMembershipLevel( 3 ) ) {

		$return_url = home_url( 'page-name-for-level-3' );

	}

	return $return_url;

}

add_filter( 'pmpro_confirmation_url', 'some_kind_of_pmpro_redirection', 10, 3 );