No one has created software to allow network rendering in Premiere as far as I know. Network renders are also usually based on Tiff/ targa sequences, etc., so no audio, not something many Premiere users make use of.
The only way I can think of this working is if you imported the Premiere timelines into After Effects and use the After Effects Net renderer.
But given the usually short render times in Premiere, it would be hardly worth the time to make it work.
Vince Becquiot
Kaptis Studios
San Francisco - Bay Area
