In the websale examples' process defintion swimlanes are set via assignment expressions:
<swimlane name="buyer" /> <swimlane name="salesman"> <assignment expression="user(ernie)" /> </swimlane> <swimlane name="accountant"> <assignment expression="user(bert)" /> </swimlane> <swimlane name="shipper"> <assignment expression="user(grover)" /> </swimlane>