Non Domain User Log On

My boss is wanting a web site where our suppliers have to log on to see
certain information on our external web site. Is it possible with IIS to use
a separate username and password list that is just for the web site or does
there need to be a domain account for each supplier that we want to give log
on access to the site?

I wouldn't mind near as much, but we inherited the currunt network setup and
the everyone group has a few too many rights all over the place so I don't
want anything extra to have any domain access what so ever. I ended up using
WS_FTP Server for my FTP because I couldn't figure out how to use an external
user list in IIS. I would prefer to not have to set up Apache just so that I
can get the web autonomy I am looking for.

Thanks!