Meta Data UD2 DIM

There should be an example in the Golf Stream app. But if you do not have access, here is one example of this Finance BR.

Namespace OneStream.BusinessRule.Finance.BR_NoInput
	
	Public Class MainClass
		
		Public Function Main(ByVal si As SessionInfo, ByVal globals As BRGlobals, ByVal api As FinanceRulesApi, ByVal args As FinanceRulesArgs) As Object

			Try
				Select Case api.FunctionType
					
					Case Is = FinanceFunctionType.ConditionalInput
			            
			            Dim pov_account As String = api.Pov.Account.Name
			            Dim pov_scenario As String = api.Pov.Scenario.Name
			            Dim pov_consolidation As String = api.Pov.Cons.Name
			            Dim pov_origin As String = api.Pov.Origin.Name
			            Dim pov_entity As String = api.Pov.Entity.Name
						Dim pov_entity_Curr As String = api.Entity.GetLocalCurrency.Name

			            Dim pov_u1 As String = api.Pov.UD1.Name
			            Dim pov_u2 As String = api.Pov.UD2.Name						
			            Dim pov_u3 As String = api.Pov.UD3.Name
			            Dim pov_u4 As String = api.Pov.UD4.Name
			            Dim pov_u5 As String = api.Pov.UD5.Name
			            Dim pov_u6 As String = api.Pov.UD6.Name						
			            Dim pov_u7 As String = api.Pov.UD7.Name
			            Dim pov_u8 As String = api.Pov.UD8.Name						
			            Dim pov_ICP As String = api.Pov.IC.Name
			            Dim pov_flow As String = api.Pov.Flow.Name							
						Dim CurrTime As String = api.Pov.Time.Name
                        Dim pov_year As String = TimeDimHelper.GetSubComponentsFromName(CurrTime).Year
                        Dim pov_period_num As String = TimeDimHelper.GetSubComponentsFromName(CurrTime).Month

						If pov_u7="NotDefined" And pov_entity<>"Entity_Admin" And pov_account<>"PCON" And pov_account<>"POWN" Then
							Return ConditionalInputResultType.NoInput
						End If					
		
                        If (pov_scenario = "None" Or pov_entity = "None" Or pov_account = "None" Or pov_flow = "None" Or pov_u1 = "None" Or pov_u2 = "None" Or pov_u3 = "None" Or pov_u4 = "None" Or pov_u5 = "None" Or pov_u6 = "None" Or pov_u7 = "None" Or pov_u8 = "None")
                            Return ConditionalInputResultType.NoInput
                        End If
							
						Return ConditionalInputResultType.Default
						
				End Select

				Return Nothing
			Catch ex As Exception
				Throw ErrorHandler.LogWrite(si, New XFException(si, ex))
			End Try
		End Function
        
	End Class
End Namespace

In this case they are testing the POV of the user to flip to ConditionalInputResultType.NoInput.

In your case, you would want to check that the user is in a specific security group and have that determine the NoInput BR.

You would then attach this BR to the cube(s).

Good luck!