VSFTP give each user different directory than home directory

Usually when you create user for vsftp, it will go to it's own home folder.

Like user: mds
Home Folder: /home/mds

To change this, What you need to use is a combo of user_config_dir and local_root.
In the main config file /etc/vsftpd/vsftp.conf you have an entry like:

chroot_local_user=YES
user_config_dir=/etc/vsftpd/users

Inside that directory (/etc/vsftpd/users) you have a config file with the same name as the user (/etc/vsftpd/users/mds), and inside that file you have:

local_root=/var/www/sites/
dirlist_enable=YES
download_enable=YES
write_enable=YES

Then the user will be direct to /var/www/sites/ through ftp.
But ssh login folder will not change.

Don't forget remove the [local_root] in the main config file /etc/vsftpd/vsftp.conf.