"Easily", probably not. At present, the FuryBSD installer seems to want to use an entire drive in the ZFS configuration options. Like Seth noted, it is possible to dual (or multi boot) using FreeBSD in general, but the specific installer options available in FuryBSD do not make such a process "easy." There is an open GitHub issue about "Documenting how to use dual boot", which has a 2020-Q4 milestone: https://github.com/furybsd/furybsd-livecd/issues/22 In the meantime, I suggest trying FuryBSD in a virtual machine instead.
"Easily", probably not. At present, the FuryBSD installer seems to want to use an entire drive in the ZFS configuration options. Like Seth noted, it is possible to dual (or multi boot) using FreeBSD in general, but the specific installer options available in FuryBSD do not make such a process "easy." There is an open GitHub issue about "Documenting how to use dual boot", which has a 2020-Q4 milestone: https://github.com/furybsd/furybsd-livecd/issues/22 In the meantime, I suggest trying FuryBSD in a virtual machine instead.