Morm, the rules seem quite categorical:
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The werewolves do not know each other's identity because while they are werewolves at Night, they cannot detect the identities underlying the curses
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Also:
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Note: Werewolves do not PM each other and therefore cannot debate with each other; thus, they are not going to find out each others' identities
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Even if the EW were allowed to communicate wolvish identities to his pack via the sub-mod, as spawn points out, it would be dangerous for him to do so.