[ownedbycats]

If I understand right, here's one instance I may find it useful:

FanFicFare adds an additional 'crossover' tag to #fanficcat when there's multiple entries. For certain sets of entries, I don't want this.

Since this isn't easy to work around in the FFF settings, I use a template to take the column, sort the entries, compare the string, and then replace if it matches:

program:
	f = list_sort($#fanficcat,0,',');

	if contains(f, '^Crossover, Mass Effect Trilogy, Mass Effect: Andromeda$', '1', '')
	then 'Mass Effect Trilogy, Mass Effect: Andromeda' 

	elif contains(f, '^Crossover, Half-Life, Portal$', '1', '')	
	then 'Half-Life, Portal' 

	else $#fanficcat

	fi

But my current solution working fairly well, so it's not a big deal either way.