I'm very sorry for machine translation in English.
If the interprocess communication between different users, you must specify a user group to 'authorizedGroup' property. Each user must belong to the same user group.
Please check this page.
http://msdn.microsoft.com/library/en-us/ms172351.aspx
However, you do not know how to set the property in the description of the MSDN.
'authorizedGroup' property is set by the constructor of IpcServerChannel using Hashtable.
' Create the channel. Dim properties As New Hashtable() properties.Add("portName", "ipcSample") properties.Add("authorizedGroup", "Users") Dim channel As New IpcServerChannel(properties, Nothing)