Hi Davide Sacchetti - Yes, this is possible as James Rait describes as well. You can assign a unit to your text banners and then you will be able to filter in / filter out the specific banner you want according to what Unit you have assigned to the banners.

Yes, I give every banner a unit designator that then is used to filter that banner. Unit designators don't have to be actual units, they can be used for shooting blocks as well.