The man who claims Lindsay Lohan struck him while she was driving her Porsche last week is demanding "six figures" from her .... and she must pay before her big probation progress hearing.
Sources connected with alleged victim Thaer Kamal tell TMZ ... Mark Geragos -- Kamal's lawyer -- has contacted Lindsay's lawyer, Shawn Holley, and made the demand ... and Geragos made it clear that his client has not yet cooperated with cops by sitting down for an interview.
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