The Revolt can’t confirm how effective this measure is but it’s worth a shot. Change your Twitter settings to GMT 3:30 (Tehran time). Then change your city location to a city in Iran (Instead of just Tehran also try cities like Meybod, Tabriz, or Shiraz). The theory goes that by masking your feed as Iranian in origin, you can help obscure the source of true tweets coming from protesters in the country, from state police.
Again, it may be a crap-shoot, but there’s no harm in changing your settings for a short while, especially if it means it might help reformers stay connected with each other and the outside world.