Just wondering if this worked for anyone.  for my query, i continued to see assets that had only 1 ip address enabled, so, i still saw all entries instead of just the ones with 2 ip addresses.  
I was able to modify the query and came up with this one that seemed to work
Select Top 1000000 tblAssets.AssetID,
  tblAssets.AssetUnique,
  tblNetwork.IPAddress,
  tblAssets.Lastseen,
  tblAssets.Lasttried,
  tblNetwork.Description
From tblNetwork As tblA
  Right Join tblAssets On tblAssets.AssetID = tblA.AssetID
  Left Join tblNetwork On tblAssets.AssetID = tblNetwork.AssetID
  Inner Join tsysAssetTypes On tsysAssetTypes.AssetType = tblAssets.Assettype
  Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Where tblNetwork.IPEnabled = 1 And Not tblNetwork.IPAddress Is Null
Group By tblAssets.AssetID,
  tblAssets.AssetUnique,
  tblNetwork.IPAddress,
  tblAssets.Lastseen,
  tblAssets.Lasttried,
  tblNetwork.Description,
  tsysAssetTypes.AssetTypename,
  tblAssetCustom.State,
  tsysAssetTypes.AssetTypeIcon10,
  tsysAssetTypes.AssetTypeIcon16,
  tblAssets.AssetName
Having Count(tblA.IPAddress) > 1
Order By tblAssets.AssetName