Do they use a active directory? If so you can have configuration to either provide a list of users with access (easier for you as you can easily query the current user logged in) or the group they should belong to to have access (a little trickier but in 3.5 you can use System.DirectoryServices.AccountManagement).
[–] 1355678? 0 points 1 point 1 point (+1|-0) ago
Do they use a active directory? If so you can have configuration to either provide a list of users with access (easier for you as you can easily query the current user logged in) or the group they should belong to to have access (a little trickier but in 3.5 you can use System.DirectoryServices.AccountManagement).