You can filter out the log outputs for every module in the OMNeT GUI window.
But you cannot "filter" simulation events, how should this work? Events need to be processed, without them, your model probably wouldn't work at all.
When stepping through the code in debug mode, the same applies. How would your model functions be called, when the INET functions are "filtered out"?
So either "silence" the log outputs from all irrelevant modules in the GUI or disable the EV log messages for modules via the omnetpp.ini (whenever available).
Take a look at the OMNeT++ manual to find out more:
https://omnetpp.org/doc/omnetpp/manual/#sec:config-sim:logging