First, give your virtual machine a fixed IP address. VMWare Fusion's dhcpd server will often change the IP address assigned to your virtual machine -- even while it's still running. While you can give the entire IP address range block access to your home directory over NFS, that can disrupt some other tools like Vagrant.
% cat /etc/exports
/Users/wtanaka 172.16.221.10 -maproot=root:wheel
Restart nfsd in Mac OS:
% sudo nfsd stop
% sudo nfsd start