Documentation

add_filter( 'ag_multi_account', 'custom_multi_account' );
function custom_multi_account( $order_id ) {

	// Create an array to hold the account details
	$account = array();
	
	// Here is where you can work out your logic to switch accounts based on the order ID

	// It's important that the array keys match the following
	$account['storename'] = 'store name here';
	$account['sharedsecret'] = 'shared secret here';

	// Return the array
	return $account;

}