You can use the whoami command with the /groups switch to display all the groups in the currently logged on user token as the following command and output show:
whoami /groups
C:Documents and Settingsali>whoami /groups
[Group 1] = “UKDomain Users”
[Group 2] = “Everyone”
[Group 3] = “MERCURYDebugger Users”
[Group 4] = “BUILTINAdministrators”
[Group 5] = “BUILTINUsers”
[Group 6] = “UKDomain Admins”
[Group 7] = “UKEnterprise Admins”
[Group 8] = “UKSchema Admins”
[Group 9] = “LOCAL”
[Group 10] = “NT AUTHORITYINTERACTIVE”
[Group 11] = “NT AUTHORITYAuthenticated Users”