SharePoint

Hello,
I would like to make a XsltListViewWebPart with a custom view in Sharepoint Design 2010.

There are 3 Profiles accessing my bug LIST:
 - Manager
 - Quality Assurance
 - Contributors (Developers, Designers and so on)
- The Contributors can see the items that are assigned to it and can also see the items that are in the group he belongs to.
- The Quality Assurance and Manager profiles must see all the items.
I need to make a filter in the view using CAML query.
I have this query:

<Where>
<! - For Quality Contributor and manager did not work ->
<Or>
<membership Type="CurrentUserGroups">
##############  MY QUESTION IS HERE ############## 
</ Membership>
<Or>
<! - For contributors - worked ->
<membership Type="CurrentUserGroups">
<FieldRef Name="Grupo_x0020_Respons_x00e1_vel"/>
</ Membership>
<Eq>
<! - For me - it worked ->
<FieldRef Name="AssignedTo"/>
<value type="integer">
<UserID Type="Integer"/>
</ Value>
</ Eq>
</ Or>
</ Or>
</ Where>
How do I make the condition for the profiles "MANAGER" and "QA" because They need to have full control of all items and the "CONTRIBUTORS" profile can only have access to their group items.

Dim exec As New SPFieldUserValue
           For Each entity As PickerEntity In sppeExecs.ResolvedEntities
               web.EnsureUser(entity.Key)
               exec = New SPFieldUserValue(web, Convert.ToInt32(entity.EntityData("SPUserID")), entity.Key)
           Next
           'now, get the list and create the item container
           Dim execList As SPList = web.Lists.TryGetList(ListName)
           If execList Is Nothing Then
               errorMessage.InnerText = "Sorry, but the Executive Director List could not be loaded.  Please contact the IT Department Help Desk @ extension 2195."
               Exit Sub
           End If
           Dim execItem As SPListItem = execList.AddItem()

           'add the executive user object and set the active field to true
           execItem(Name) = exec
           execItem(Active) = True