Forms by Entity

Stepping away from the use of dashboards for a moment, and looking back at Form Templates, it's not "officially" possible to make a Form Template conditionally show/hide from the Form Group.

However you can use a dirty trick by using the Form Frequency Member Filter.
You could have a Custom Member List, which if you want to show this Form Template then it returns all the months in the current WF Year.  And if the Form Template should not be shown, then the Member List returns an empty list.

So you're switching on/off the Forms Template by interfering with the Frequency Filter by pointing it to a custom member list.
Let's say I wanted this Forms Template to be conditionally shown, depending on the WF entity assignments.
Then I can use the Frequency Member Filter and put in a custom member list on the Time dimension, even though the decision to show it is based on entity. 

Then in the Custom Member List rule , it will either return a list of time periods in the current year (which makes the Form template visible), or it returns an empty list of time members (which makes the form template invisible).

The BR can then check the current WF profile against the assigned entities, and decide whether the specified CubeView should be shown or hidden, and return either an empty or complete Time filter accordingly.

Here's an example BR which switches the Form Template on/off depending on the WF Profile Entity assignment. In this simple case I just test if any of the assigned entities begin with the word 'Houston' , just for simplicity:

If args.MemberListArgs.MemberListName.XFEqualsIgnoreCase("IsFormValidForEntity") Then
	'-- Usage: T#Root.CustomMemberList(BRName=CustomLists, MemberListName=IsFormValidForEntity, CVName=[MNG_Accts])
	
	Dim wpi As WorkflowProfileInfo = brapi.Workflow.Metadata.GetProfile(si, si.WorkflowClusterPk.ProfileKey)
	Dim st As ScenarioType = api.Scenario.GetScenarioType(si.WorkflowClusterPk.ScenarioKey)
	api.LogMessage("CVName:" & args.MemberListArgs.NameValuePairs.GetValueOrEmpty("CVName") )
	
	' -- Get the current workflow's Text1 property, for the current WF scenario --
	Dim strWFText1 As String = wpi.GetAttributeValue(st.id, _
			SharedConstants.WorkflowProfileAttributeIndexes.Text1, String.Empty)
	api.LogMessage("Workflow Text1 property:" & strWFText1)

	' -- get list of Entities assigned to the parent workflow profile --
	Dim lstProfileEntities As List(Of WorkflowProfileEntityInfo) = brapi.Workflow.Metadata.GetProfileEntities(si, _
			brapi.Workflow.Metadata.GetParent(si, si.WorkflowClusterPk.ProfileKey).ProfileKey )
	For Each eInfo As WorkflowProfileEntityInfo In lstProfileEntities
		api.LogMessage("Workflow Entity:" & eInfo.EntityName)
	Next

	Dim objMemberListHeader = New MemberListHeader(args.MemberListArgs.MemberListName)
	Dim timeMbrs As List(Of Member)
	If strWFText1.StartsWith("Houston", StringComparison.InvariantCultureIgnoreCase) Then
		timeMbrs = api.Members.GetBaseMembers( _
			api.Dimensions.GetDim("Time").DimPk, _
			TimeDimHelper.GetYearIdFromId(si.WorkflowClusterPk.TimeKey))
	Else
		'otherwise return empty list of time members , which prevents the form template from showing
		timeMbrs = New List(Of Member) 
	End If
	Return New MemberList(objMemberListHeader, timeMbrs)

End If

Disclosure: this is a bit of a dirty trick, using a custom Time filter to switch on/off a Form Template. That means that if you go back to a fixed Time Frequency on the Form Template (e.g. Monthly, or All Periods), then your historic time periods will show forms profiles that have been completed , but with on Form Template in there shown but not in the complete state (because it was hidden at the time). So your workflow profile history will show an unstable state if you change it back in the future.