Get Windows User name in Form

Is there a way to pull the unsername/ login of the ID that is the current person
looged into the machine?

I would like to be able to pull the user name of the person filling out the
form.

If so could you provide an example ?

var login = identity.loginName;

Well, actually there is another way to do this too. Use a VBScript to get the
name and then use the VB JSObject to pass the data to Acrobat and insert it into
a field via FDF, XML, XFDF, etc..

Alternatively you could use AppleScript and a shell script and if you wanted to
make it platform independent you could probably use perl.