Does FreeBSD support network virtualization like Crossbow?

There is an initiative to get OpenStack working in FreeBSD and this solution requires a software-defined networking (SDN) layer. Based on the FreeBSD Project page, the team at Semihalf.com are porting over Juniper's SDN sub-system.

GitHub Project. (as of 2020 no updates in 6 years)

For those who are not aware, Juniper has used a fork of FreeBSD for many years although I understand that they are a couple versions back.