I am not 100% clear on the difference, but it seems that you can just replace the word Artist with AlbumArtist.
so instead of:
Artist Like "{1}"
write
AlbumArtist Like "{1}"
I don't know if you would need to adjust the artist xml file though since it is created based on artist, not album artist.
Probably you would need to add a few entries like "Various Artists", "Unknown" etc.
By the way if you are familiar with SQL, then you should know that the way the command works, there is a part at the beginning that is already implied.
"Select from songs where "
so what you were trying to do would end up with an SQL query like this:
"Select from songs where Artist where AlbumArtists="{1}" order by random() limit 200
so you can see why it would not work...