Much as it is possible to use ExecAsOriginalUser to run something using the starting/logged in user's credentials, is there a command or way to run a particular piece of code as a specific user?

To explain further, I am writing the computer name into a log on a file share at the end of installation. This works perfectly as long as not installing using a local Administrator account which does not have a matching local Administrator account on the server. Therefore, what I need to do is have the particular bit of code that writes to the log execute as a specific user account, which I have the credentials for, that I know exists on the server.

The code I am using is as follows:

// Auto audit the computer name
procedure AutoAudit();
var
  strComputerName: TArrayOfString;
  strAutoAuditFile: String;
begin
  strAutoAuditFile :=
    '\\' + ClientConnectionPage.Values[0] + '\Audit\Client Audit.txt';
  SetArrayLength(strComputerName, 1);
  strComputerName[0] :=
    ExpandConstant('{computername} ') +
    GetDateTimeString('dd/mm/yyyy hh:mm', '/', ':');
  SaveStringsToFile(strAutoAuditFile, strComputerName, True);
end;

So, what I need is a way of executing the SaveStringsToFile function as another user.

I have thought of a rather messy way to do this, which would involve testing for an available drive letter, mapping a drive using the account credentials, writing to the file and then disconnecting the drive. However, I am hoping there is a more elegant way to do this?