Allow independent authentication for each Perspective page on a client

I would like to test a Perspective application for a multi user scenario from a single client machine. My thought was to open a bunch of Perspective web clients on the machine, but once you login to any page all pages have the same account. What I would like is to have each web client authenticate independently so that each one can have its own account. Is that possible?

The next challenge will be to have a test script that selects the same button on each client simultaneously. I am not sure if there is a toll for that.

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