If it's something you want to do periodically to an existing report, you can just type "MSW-TRD" in the search box at the top of the asset name column. That will filter the report for asset names that contain the text.
If you want to create reports explicitly for those training computers, add a condition to the WHERE clause, e.g.
SELECT Top 1000000
tblAssets.AssetID,
tblAssets.AssetName,
tsysAssetTypes.AssetTypename,
tsysAssetTypes.AssetTypeIcon10 As icon,
tblAssets.IPAddress,
tblAssets.Lastseen,
tblAssets.Lasttried
FROM
tblAssets
INNER JOIN tblAssetCustom ON tblAssets.AssetID = tblAssetCustom.AssetID
INNER JOIN tsysAssetTypes ON tsysAssetTypes.AssetType = tblAssets.Assettype
WHERE
tblAssets.AssetName Like 'MSW-TRD%'
AND tblAssetCustom.State = 1