Sharing objects between states

[STPeters <stefan@...>]

*NOTE: this is being asked on behalf of a Lua forum user. I thought this 
came up before on the list, but can't seem to find it, and I am stumped. 
I can pass along the info, or you can reply directly at 
http://forum.luahub.com/index.php?topic=3138.msg7072 - thanks for your time!

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Can an object be created in one Lua state, passed to C++, and then 
passed to a script running in a different Lua state?

The reason I ask is that I'd like scripts responsible for object 
creation to have a different set of available APIs than the scripts 
which later control the object, as well as run on a different thread 
(native thread - each of these interpreters in turn contains many Lua 
threads). They will never be accessing the object at the same time.

Does the use of Luabind, as opposed to native C wrappers, affect the 
answer to this question?

They are derived from a C++ base class, with virtual functions 
reimplemented in Lua (and called from C++ with Luabind glue), and 
instantiated from Lua. So I guess that makes them Lua objects used by C++.