no I dont think this is possible but a vba programmer could create such a thing it would however require you to put an attribute into the pipe element ..or tell it what to use
One suggestion I could make to make this easier for detailing is to only put pipes on levels named by their diameter ie 250 pipe, 300 pipe then you could at least see all the 250 diams or move the mouse near element and flyout would tell you even so your still going to have to add that either manually or edit the secondary dim..
The edit could be sped up with some variables that create some custom custom constants Bob Mecham from Envision Cad has publish a tutorial on just this feature for the pop calc in the latest issue of Control Alt Delete
see his articles here
envisioncad.com/.../customizing-values-in-accudraw-popup-calculator
it may be of some help or not .. I havent tried it yet...