If I understand You right ... yes. You can install the default vsftp.
It can be done with yast (software >> software management).Just select vsftpd from the list,press "Accept" and it should be automatically installed.
In the default configuration system users will also have ftp accounts in their home directories.Users can be added also by Yast (Security and users >> user management).
You should also take a look at the configuration file of the vsftp.It should be somewhere in /etc,ex. vsftpd.conf and enable chroot.
I don't remember what You should change in that file to enable chroot.More information can be found in the server's documentation under /usr/share/doc/packages/vsftp
Every change requires restarting of the ftp server by entering something like
If it comes to ISPConfig and VSFtpd You can use them together by selecting vsftp durring installation of ISPConfig.