SELECT DISTINCT PD.vch_FirstName + ' ' + PD.vch_PersonSurName AS Name
FROM tbl_UserGroup UG
        INNER JOIN tbl_UserUserGroup UUG ON  UUG.int_UserGroupId = UG.int_UsergroupId
        INNER JOIN tbl_Users U ON U.int_UserId = UUG.int_UserId
        INNER JOIN tbl_PersonalData PD ON PD.int_PersonalDataId = U.int_PersonalDataId
WHERE U.int_UserId <>  1 AND UG.vch_GroupName IN
                (
                    SELECT UG2.vch_GroupName
                    FROM tbl_UserGroup UG2
                        INNER JOIN tbl_UserUserGroup UUG2 ON  UUG2.int_UserGroupId = UG2.int_UsergroupId
                        INNER JOIN tbl_Users U2 ON U2.int_UserId = UUG2.int_UserId AND U2.int_UserId = 1
                )
GROUP BY PD.vch_FirstName, PD.vch_PersonSurName