Exporting selinux labels via network file systems

[Andreas Thienemann]

Hey,

is there any way of exporting selinux labels via nfs or any other network 
file systems?

I've found some statements on the NSA selinux page indicating that NFS4 
might be able to do this, but does current fedora and rhel support this?

I know about the workaround of setting a general filecontext through the 
context mount option, but I'm looking at something a bit more 
fine-grained.

regards,
 andreas