Today a number of OS provide some form of kernel-level virtualization that offer better isolation mechanisms that the traditional (yet more portable) &chroot(2). Currently, NetBSD lacks functionality in this field; there have been multiple attempts (gaols, mult) to implement a jails-like system, but none so far has been integrated in base.
The purpose of this project is to study the various implementations found elsewhere (FreeBSD Jails, Solaris Zones, Linux Containers/VServers, ...), and eventually see their plus/minus points. An additional step would be to see how this can be implemented the various architectural improvements NetBSD gained, especially rump(3) and kauth(9).
Caution: this is a research project.