If you check Wine's source:
void WINAPI RtlCopyLuid (PLUID LuidDest, const LUID *LuidSrc)you see that this little NtDll API is very strong: no check is done, so it could be used literally for anything. A simple way to use it is just to jump, by setting the right arguments.
{
*LuidDest = *LuidSrc;
}