View tasks on other boards under a high level task

Hi,
We have a high level project management board which has a list of all our open orders and this has a unique order number.

On our daily/team tasks board, this number is used as a reference and it shows the due date etc from the high level board.

On the high level board, we would like to be able to select an order and view the status of tasks associated with that order, almost like have items on one board show as sub tasks on the high level board perhaps.

Any pointers would be appreciated.