The KVMFR kernel module is not LG version specific, only the host and client application versions need to match.
See: libvirt/QEMU Installation — Looking Glass B7-rc1 documentation
Note I am referencing the B7-rc1 documentation as the KVMFR documentation has been improved substantially, the details here still apply to B6. You may also need to compile the kernel module from B7-rc1 even if you are on B6 if your kernel version is too new.