Well, depending on how many Aux Sends you have, you could send say 3 different signals out of the same track and do whatever you want from there. If you had 3 channels of a parametic or even some filters, I suppose you could do this.
Now that I'm really thinking out it, you could either go out of your 3 auxes to the processor, then come-back to 3 more channels to EQ.
Or, directly out the 3 channels to another 3 channels, EQ, then out 3 auxes to be processed , and then back into 3 more channels. All depending on what you want.
However, with the option right above, I wouldn't recommend it unless you had a nice multi-buss board. I use to do all this crazy routing on an Otari 24-buss console (don't remember the model) when I had the rare chance to work on it.