Select Top (1000000) tblAssets.AssetName, tblAssetcustom.Custom1, tblADComputers.OU
From tblAssets
	Inner Join tblAssetcustom On tblAssets.AssetID = tblAssetCustom.AssetID
	Inner Join tblADcomputers on tblAssets.AssetID = tblADComputers.AssetID
		Where Custom1 = 'FD102' Or OU ='102'
I'm recommending you to take a look at the 
SQL language because lansweeper reports/queries are basicly made by SQL. Once you understand how SQL works, creating reports/queries wont be a hard task 
🙂