Multiple triggers for an Azure Function

No, this is not a supported scenario at the moment.

From comments (Ling Toh Jan 18 '17 at 18:23): There are no plans to support multiple triggers per Function. You will have to create a Function for each EventHub. If there is common code that may be shared between Functions, you may move them to a helper method that can be called from each Function.

From Github: Any workarounds for adding multiple triggers? #1544

If you want to have your same function code run for blobs in either account A or account B, the easiest thing to do this is to create multiple function.json files for each function but have them share the same code by pointing to the same script file. There's more info here.