For Windows computers, you need to build a report based on tblNetwork, which stores a machine's network card(s). E.g.:
Select Top 1000000 tsysOS.Image As icon,
tblAssets.AssetID,
tblAssets.AssetName,
tblAssets.Domain,
tblNetwork.Description As NIC,
tblNetwork.MACaddress,
tblNetwork.IPAddress,
tblAssets.Firstseen,
tblAssets.Lastseen
From tblAssets
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tblNetwork On tblAssets.AssetID = tblNetwork.AssetID
Inner Join tsysOS On tsysOS.OScode = tblAssets.OScode
Where tblAssetCustom.State = 1 And tblNetwork.IPEnabled = 1
Order By tblAssets.Domain,
tblAssets.AssetName,
NIC