No, I dont believe this feature exists. You can however limit the commands the customer is able to enter. For example you can allow him to only issue the commands show interface or show xlate. The following link is a guide to configure this, the feature is called Command Authorization. Just remove the write terminal, show config, show start, show run commands from whatever priviledge level you assign their login.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
[toc:faq]Introduction:This document describes details on how NAT-T
works.Background:ESP encrypts all critical information, encapsulating
the entire inner TCP/UDP datagram within an ESP header. ESP is an IP
protocol in the same sense that TCP and UDP are I...