Hello, Yes there is.
Here is a small macro to do what you need to do.
funckey s "shape add; setwindow form.mini;FORM mini dyns_netname_list"
I assigned it to the s key on my keyboard :)
when you add the macro to your env file and hit the assigned key in Allegro it will pop up a dialog box so you can select the net for your shape. Keep in mind function keys in allegro are case sensitive. Works pretty good.