Yes, you most certainly can.
Of course, this does assume that the data engine you are using is not JET,
but sql server.
So, you can actually use ms-access with sql-server, Oracle or whatever. All
of those data systems allow connections across the internet.
However, you can't use a file share in this fashion. You can read up about
problems, and some solutions about using ms-access remotely. The article is
here:
http://www.attcanada.net/~kallal.msn/Wan/Wans.html
