.net is basically an edgelist format with sections for vertices, arcs and edges. Vertex attributes for 'label', coordinates named 'x','y','z', 'color' as 'ic' (inner color), 'shape' as a shape value will be written in the appropriate Pajek format. An edge attribute of 'weight' will be written as the edge value, 'width' as 'w' and 'color' as 'c'. See read.paj
for reading pajek files (time info supported)