Hi
You could use a TextArea input which supports multi-line input. I'm guessing that your workflow uses a String.split(',') call to turn each CSV into an array so this would work
I can't recall what the input length limit for a TextArea is but it should be in order of Kb IIRC
Alternatively, the Datagrid might work but it depends on how you're handling ADD vs REMOVE tags (operations embedded in text? e.g.,
<VMNAME>,ADD:<Tagname 1>,REMOVE:<Tagname 2>
etc?