Just append "\test" to any list value, and you'll see what I mean. How you create the data is up to you. I use
PvdImport, and fill Actors with the SLQ expression...
Select PEOPLE."name" || '\' || CAREER."role"
From PEOPLE Inner join CAREER on (CAREER."pid" = PEOPLE."pid")
Where CAREER."ctype" = 0 And CAREER."mid" = @id
...which concatenates [Name], "\" and [Role]. I suppose I could do something similar with directors and actors, but SQL hurts my brain—and you probably don't use
PvdImport anyway. I don't see a way to combine an existing field with an existing list field using an expression. To make matters even more complicated, some movies credit more than one director. I'm tempted to utter the R-word...
But do you really have any need for this? In a "Panes and Details" view, if you select one particular director, the details pane will show only the movies that director directed, and an actors pane will show only the actors credited in those movies. Isn't that the information you're after?