You might be able to use the environment variable PERL5OPT. Set it to contain '-MYour::Filter', and this will be added to the command line of every perl script run.
See the "Environment" section of perlrun.
Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong." -Richard Buckminster Fuller