You can handle multiple CCs by using a Select Case or ElseIf. Personally, I find the Select Case to be a bit more flexible so an example would be
Code:
Private Sub Document_ContentControlOnExit(ByVal CCtrl As ContentControl, Cancel As Boolean)
Dim i As Long, j As Long, StrDetails As String
With CCtrl
Select Case .Title
Case "Client"
'do something
Case "Client1", "Client2", "Client3"
'do something else
End Select
End With
End Sub