The IInetLogInformation::GetComputerName method obtains the name of the local machine to which the logging module is being applied.
virtual LPSTR STDMETHODCALLTYPE GetComputerName( IN PCHAR pszComputerName, IN PDWORD pcbSize );
Logging modules should query for this method if a server instance has set the MD_EXTLOG_COMPUTER_NAME flag of the MD_LOGEXT_FIELD_MASK metabase identifier.
LogExtFileComputerName, MD_LOGEXT_FIELD_MASK