Hide widgets by widget area ID based on the user's membership level.

my_pmpro_widget_display_by_level_id_callback.php

<?php
/**
 * Hide widgets by widget area ID based on the user's membership level.
 * Update the $hide_sidebars_array with the array of sidebar IDs you want to filter.
 * Update the $show_for_levels_array with the array level IDs you want this sidebar visible for.
 */
function my_pmpro_widget_display_by_level_id_callback( $instance, $widget, $args ) {

	// Set an array of widget areas by ID to filter.
	$hide_sidebars_array = array( 'sidebar-1', 'sidebar-2' );

	// Get the current queried object to check access.
	$show_for_levels_array = array( 1, 2, 3 );

	// Check if this widget area should be filtered.
	if ( in_array( $args['id'], $hide_sidebars_array ) && function_exists( 'pmpro_hasMembershipLevel' ) && ! pmpro_hasMembershipLevel( $show_for_levels_array ) ) {

		// Hide the widget if user doesn't have access to view the queried object.
		return false;

	}
	return $instance;
}
add_filter( 'widget_display_callback','my_pmpro_widget_display_by_level_id_callback', 10, 3 );