Diff. Brokers and OrderQtys for a single order

Imported from previous forum

Is there a way I could specofy a list of brokers for a ‘single’ order so that I can direct respective order quantities to those brokers.

That is to say for example I send an order through my buy side fix engine. In that order-message could I imply that route Quantity X to Broker A and Quantity Y to Broker B for a single order?