chroot_local_user=YES

usermod --home /var/www/ username

chroot_local_user=YES
local_root=/ftphome/$USER
user_sub_token=$USER

mkdir -p /ftphome/{test,user1,user2}
chmod 770 -R /ftphome
chown -R ftp. /ftphome
usermod -G ftp test

[root@mail tmp]# ftp localhost
Connected to mail.linuxian.local.
220 (vsFTPd 2.0.5)
530 Please login with USER and PASS.
530 Please login with USER and PASS.
KERBEROS_V4 rejected as an authentication type
Name (localhost:root): test
331 Please specify the password.
Password:
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> mput vhosts
mput vhosts?
227 Entering Passive Mode (127,0,0,1,146,41)
150 Ok to send data.
226 File receive OK.
24 bytes sent in 3.3e-05 seconds (7.1e+02 Kbytes/s)
ftp> ls -rlt
227 Entering Passive Mode (127,0,0,1,97,90)
150 Here comes the directory listing.
-rw-r--r--    1 787      787            24 Oct 11 19:57 vhosts
226 Directory send OK.
ftp> 221 Goodbye.

usermod --home /var/www/ username

chroot_local_user=YES
local_root=/home/$USER/www-data
user_sub_token=$USER

# chmod a-w /home/$USER/www-data