Nhibernate DetachedCriteria Left Outer Join subquery

I will try to present the main part of the problem, because the whole situation is much more complicated - I cannot achieve the following with DetachedCriteria

SELECT *
FROM User
LEFT OUTER JOIN GroupItem
ON User.ID = GroupItem.UserID
AND _groupItemRestrictions_

      

        
        
        
      

    

There can be multiple GroupDefinitions, A user can belong to multiple GroupItems, each of which belongs to its own GroupDefinition. Due to some tricky reason related to paging / sorting and (layered) grouping behavior, I am unable to achieve the appropriate paging behavior with this query:

SELECT *
FROM User
LEFT OUTER JOIN GroupItem
ON User.ID = GroupItem.UserID
WHERE _groupItemRestrictions_

      

        
        
        
      

    

A request similar to the second is created as follows:

var criteria = DetachedCriteria.For<User>()
...
GroupItem groupItem = null;
criteria.CreateAlias(() => groupItemAlias, () => groupItem,
                                                JoinType.LeftOuterJoin);
criteria.Add(Restrictions.Or(...));
...

      

        
        
        
      

    

Is it possible to create the first request with DetachedCriteria?

Thank!