Restrict area of effect

[qFox]

Is there a way to restrict the area to which a certain entity searches?

Like the range of the collecting officer, the range of ants, the range of a souldestroyer or search area of engineers? And I dont mean artificially block (if possible at all, it will in fact not work anyways since the entity will still try).

So far I'm only able to restrict location of placement (duh).

[Icepick]

Nope.
I loathe making posts as short as this, but there you go.