[rt-users] Filter Tickets on LastUpdatedBy <> InternalUser

[Lee Hughes]

I've seen lots of requests for this in the archives but couldn't find  
an easy solution. I'm looking for the TicketSQL syntax to only show  
tickets where the LastUpdatedBy is not an RT user; i.e., the ticket  
has been updated by an external party and therefore needs our attention.

Any help or ideas are greatly appreciated.

Thanks-

Lee