Export from Rhino to Envimet - .inx file

Hi everyone!
I am exporting a file created on Rhino to Envi-met with Dragonflay and I was wondering something…
Is it possible to create several .inx files that contain different parts of the whole model (it is a portion of a city)? Thus, creating the .inx files not based on the single elements but on the selected model portions.
Thanks in advance,