synchronization between 2 users with different roles

Hi! I'm a begginer with ASP, and I ask little help for something.I'm workin with Visual studio 2010 and I'm trying to create an ASP.net Web Site, language used -  C#

 I have 2 different pages, for 2 different users with 2 different roles.Each page has a textbox.I have already created them.What I want to do, is to make a bind between this 2 textboxes, so that the second to get the first boxes' text.I managed to do it, but only if the textboxes are on the same page, very easy (Textbox2.Text=TextBox1.Text) . But how to do it for 2 different pages, for 2 different users with 2 different roles?
Another trouble would be....How can I connect the both users same time....after i start debugging the project, I do a sign in but when I sign in with the second user,the first is automatic ...