zapier-send-webhook-level.php

<?php
/**
 * We'll add in a check to see which membership level was purchased. 
 * We can then specify which webhook each level should send data to. 
 * If it doesn't meet the criteria of our check, we'll use the default
 * in the settings page. 
 * That URL is then added to the $data array
 */
function mypmpro_multiple_zapier_webhooks_after_order( $data, $order, $user_id ){

	if( isset( $order->membership_id ) ){

		$level_id = intval( $order->membership_id );

		if( $level_id == 1 ){
			$data['webhook_url'] = 'https://zapier.com/webhook_url_1';
		}

	}

	return $data;

}
add_filter( 'pmproz_added_order_data', 'mypmpro_multiple_zapier_webhooks_after_order', 10, 4 );

/**
 * We'll retrieve the URL from the $data array if it's available and use it
 */
function mypmpro_custom_webhook_url( $url, $data ){

	if( isset( $data['webhook_url'] ) ){

		$url = $data['webhook_url'];

	}

	return $url;

}
add_filter( 'pmproz_prepare_request_webhook', 'mypmpro_custom_webhook_url', 10, 3 );