Net-Filtering Deal Could Yield Millions - Nearly a dozen software companies, most of them American, are competing for a contract to help Saudi Arabia block access to Web sites that the Saudi government deems inappropriate for that nation's half-million Internet users...Responding to critics of the sale of content filters, software company executives say that they are only providing politically neutral tools..."The government feels the need to intervene. Once we sell them the product, we can't enforce how they use it." [Matthew Holt, a sales executive for Secure Computing, of San Jose, California]