Sure, this can be done. It would require a script that modifies the text received. Currently, by default, the nick of the person sending a message, along with a message looks something like
Code:
<RusselB> Hi racebanner


It sounds like you want it to look like
Code:
RusselB| Hi racebanner


Please confirm, or give an example of what you would like it to look like, so that we can help you with a script.