[Zope] Acquisition, Not! How?

[Júlio Dinis Silva]

I know this sound strange but is there a way to,
during execution of a dtml method, when a with tag is used one
force acquisition not to be used?

example:

/root/a/b/c
/root/c

say <dtml-with "root.a.c"> was a mistake so I dont want the root.c namespace 
to be imported due to acquisition and instead I want to raise an exception.

How can I "turn off" acquisition?

I love acquisition, I know its great but I dont want it in a specific case. 
Is there a way to turn off?

Thanx,
Júlio Dinis Silva
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