There are two lists.
One is permanent, the other on a pull-by-pull basis.
If the mob is of a type you don't want, e.g. "an orc pawn" , use /addignore "an orc pawn"
From here on out, all "an orc pawn" will not be pulled. The version of KA you use will blunder into them while pulling something else.
If you want orc pawns, just not that particular orc pawn, target the mob then use /addignore "an orc pawn" 1
If you want to edit the file, open KissAssist_info.ini. Each zone has its own ignore list.
But wait, there's more!
You can direct your puller to focus in a particular direction. To do this, open up your puller's INI and look for:
[Pull]
PullArcWidth=0
0 or 360 means pull in a circle, or all around you. If you set it to 90, then the puller will only pull mobs in a 90 degree arc, 45 deg on each side. Face your puller in the direction of the mobs you want.
If that orc pawn is in a spot you don't care about, face away from it and set PullArcWidth to some value that omits it, say 270 or whatever works for you.