New Post: Authorizing Twitter user

Hi,

I’m new to this so forgive me if this is a stupid question:

I’m making an ASP.NET application that posts tweets on behalf of the user.
This works fine, but if I save the access tokens and consumer keys – to avoid the authorization procedure, and a different Twitter user is logged in on my computer, the user that authorized the access in the first place gets the tweet (as I would expect)…

Is there any way to check that the Twitter user that authorized the access is indeed the Twitter user that is currently logged in on the computer?