You can restrict it to specific accounts on *your* computer. The accounts
on other machines are not recognized by your machine in a workgroup setup.
That said, if you set up the same username and password on two machines,
they will authenticate transparently as if it was the same account. But its
up to you to keep the passwords in sync.
http://support.microsoft.com/?kbid=304040
http://support.microsoft.com/default.aspx?scid=kb;EN-US;307874
You will need to disable 'simple file sharing' (see articles above.)
Then you can set permissions on folders using the Security tab on the
folder's property page and also set them as 'shared'. 'Shared' folders will
have an additional set of permissions that apply only to network access
(i.e. the Share permissions have no effect on people sitting at the
keyboard.) Over the network, the filesystem permissions ("Security" tab)
and the Share permissions will *combine* to form the most restrictive set.
This means that if Bob can "Modify" a file on the Security tab but can only
"Read" according to the Share permissions, he will only be able to Read the
file over the network, not change it. But if he is at that computer sitting
in front of the keyboard, he can Modify.
I hope this is what you were looking for...
