If the list is sufficiently small, Send= Editor, in conjunction with
an Editor= entry for each member in the list, will do the trick.
Size is not really the issue, but for a large list this could become
unwieldy.
 
You should take care to ensure that the 'main' editor is the first one
specified.
 
As I read the LISTKEYW MEMO, Editor= (listname) is not valid.  If it
were, then you could put
 
              Send= Editor
              Editor= SOMEONE@SOMENODE The Real Editor
              Editor= (listname) Others allowed to submit material
 
As things appear to be, you must specify the 'others' individually.
 
Niall