I have working solution.
1 In process definition
1.1 Assign tasks to swimlanes
1.2 Assign swimlanes to java handlers
1.3 Create AssignActor task and insert it right after the StartState
1.4 Assign AssignActor task to the Actor or the Group making assignment decisions.
1.5 Create default controller for AssignActor task and add variable for each task that needs reassignment
2 In java handlers (1.2)
2.1 Get proper variable (1.5) from context instance and assign swimlane to it's value.
3 In web interface
3.1 In the AssignActor task web page set all task variables(1.5) with proper Actor or Group ID's