If you use it to write a FUSE filesystem, then yes, because it's using FUSE.

If you link (-llkl) directly to your program, then no, since it's all in the same process. But this is not exposing the POSIX API or a host filesystem, so that's possibly not useful, depending on what you're trying to do.

I compare lkl to libguestfs in my article here: https://rwmj.wordpress.com/2015/11/07/linux-kernel-library-b...