How to set condition to UNION ALL Query

Dear All,
Below is my SQL query in which I have used UNION All In my outer query. so I want to select data onwards particular date . Is it possible? if yes please reply.
(if you are not getting my question plz revert me)

--------------------------------------------------------------------------------------------------
--KNOW-HOWS
-------------------
	SELECT KnowHowID AS Id,
			FirstName + ' '+ LastName AS PostedBY,--PostedByID
			Title AS Title,
			ImagePath AS PhotoGraph,
			PostedDateTime AS DateTime,
			'knowHows' AS FeatureName,
			'' AS cnt
	FROM uvw_KnowHows 
	WHERE Active=1 AND PostedByID IN( --This query is for all friend of this user
						SELECT FriendID 
						FROM tblFriends 
						WHERE UserID=422973513 AND ISApproved = 1
					UNION ALL
						SELECT UserID
						FROM tblFriends 
						WHERE FriendID =422973513 AND ISApproved = 1
					UNION ALL
						 --This query is for All members in common network with this user
						SELECT FK_UserID 
						FROM tblNetworkMembers 
						WHERE FK_NetworkId IN (
												SELECT FK_NetworkId 
												FROM tblNetworkMembers 
												WHERE FK_UserID=422973513 
											   )
						 )
UNION All 
---------------------------------------------------------------------------------------------------------------------
--NEWS-VIEWS
-------------------
	SELECT NewsViewsID AS Id,
			FirstName + ' '+ LastName AS PostedBy,
			Title AS Title,
			ImagePath AS PhotoGraph,
			PostedDateTime AS DateTime, 
			'NewsViews' AS FeatureName,
			'' AS cnt 
	FROM uvw_NewsViews 
	WHERE Active=1 AND PostedByID IN(
						  --This query is for all friend of this user
						SELECT FriendID 
						FROM tblFriends 
						WHERE UserID=422973513 AND ISApproved = 1
					UNION ALL
						SELECT UserID
						FROM tblFriends 
						WHERE FriendID =422973513 AND ISApproved = 1
					UNION ALL
						 --This query is for All members in common network with this user
						SELECT FK_UserID 
						FROM tblNetworkMembers 
						WHERE FK_NetworkId IN (
												SELECT FK_NetworkId 
												FROM tblNetworkMembers 
												WHERE FK_UserID=422973513 
											   )
						) 
UNION All 
---------------------------------------------------------------------------------------------------------------------
--PUBLIC IMAGE
-------------------
	SELECT PhotographID AS Id,
			FirstName + ' '+ LastName AS PostedBy,
			Title AS Title,
			[Path] AS PhotoGraph,
			PostedDateTime AS DateTime,
			'PublicImage' AS FeatureName ,
			'' AS cnt
	FROM uvw_PublicAlbum  
	WHERE Active=1 AND UserID IN (
						 --This query is for all friend of this user
						SELECT FriendID 
						FROM tblFriends 
						WHERE UserID=422973513 AND ISApproved = 1
					UNION ALL
						SELECT UserID
						FROM tblFriends 
						WHERE FriendID =422973513 AND ISApproved = 1
					UNION ALL
						 --This query is for All members in common network with this user
						SELECT FK_UserID 
						FROM tblNetworkMembers 
						WHERE FK_NetworkId IN (
												SELECT FK_NetworkId 
												FROM tblNetworkMembers 
												WHERE FK_UserID=422973513 
											   )
					 )