Some days ago I checked this behaviour on a small test elevator using two SL viewers and an alt avatar on the 2nd viewer.
The result:
- if the moving object is non-physical (moved by llSetPos() ) the movement continues; visible on both viewers.
- if the object is physical the movement freezes; also visible on both viewers.
This is independent from the object's movement source: either by llMoveToTarget() or by a vehicle's linear motor (llSetVehicleVectorParam() ) .
Addenum: this behaviour is already listed in the public JIRA issue tracker since Mar-2007:
http://jira.secondlife.com/browse/SVC-34
It is possible to log in and vote for a (hopefully) faster resolving of this issue.
Regards
Geraldo