I'm not sure I know what you mean (I thought lua couldn't be dumped in the format)
there is the \luafunction array which needs an allocator but that doesn't sound like what you mean?
We had some plans to add an allocator for that, but I have a luatex manual, I'll look:-)

After a look in the manual, I was talking about lua.bytecode... It would need an allocator too (and a few high-level functions in order for packages to retreive their data).

Thank you,
--
Elie