That's not true.  Lamport clocks work across any number of nodes/processes.  The figures in Lamport's paper all show examples using three processes:<p><a href="http://docs.google.com/viewer?a=v&#38;q=cache:IJxXjuFmdHEJ:citeseerx.ist.psu.edu/viewdoc/download%3Fdoi%3D10.1.1.112.7608%26rep%3Drep1%26type%3Dpdf+vector+clock+lamport+clock&#38;hl=en&#38;gl=us&#38;pid=bl&#38;srcid=ADGEESj9G9HmsPpW6K6_8GQQ8xB-FQG2Y6NoEPNFrc_Cy7jcugKba8os_np3_7KQ2ecdS2M3cf_7VKc20VWaIqFZWpALejCa3mXf3CIcyhvvCCvL67WXK-bF45N5ewp9ODFem5R5p8aU&#38;sig=AHIEtbQ4rf26DoHRXxGghyaByJnFtTWR2A" rel="nofollow">http://docs.google.com/viewer?a=v&#38;q=cache:IJxXjuFmdHEJ:c...</a>