Personal rule matching ToCc

[Ramprasad]

Hi,
   I want to write a personal domain-wise rule 
The rule I am using now is 

 header __TO_DOMAIN_NET    ToCc =~ /[EMAIL PROTECTED]/i

But the above rule would match "@domain.net" as well as
"@domain.net.in" 
Which is the best way to match only @domain.net and not @domain.net.in 

Thanks
Ram