This group includes the following conditions: Windows groups, user groups, machine groups. The Windows group condition specifies ...

This group includes the following conditions: Windows groups, user groups, machine groups.  The Windows group condition specifies the names of the groups to which the user or computer account that is attempting the connection belongs.  The user group condition restricts the policy to only clients matching the specified group name.  The machine group condition restricts the policy to only clients matching the specified group name.