I would to re-use an application account for our secure ftp .ssh Is there a way to setup .ssh so that ~ is not my unix $HOME directory but rather another directory or softlink under $HOME?

For example, if I scp a file from nodeA to uname@nodeB. My $HOME on nodeB = /export/uname. Is there a way to setup the .ssh on nodeB so that any secure ftp transmissions default to /export/uname/sftproot ? Or, is there a way to lock the secure ftp transmissions to another directory other then $HOME.

Thanks in advance,
Dan