Currently Infrastructure modeller does not directly read the PBF or XML formats provided by open street map. However as suggested here you could process the data provided into a format that AIM can use.
The model builder service can be leveraged to bring OSM data into a model, there is not a direct import available in the product. If there is a specific mapping service you are interested in connecting to it is possible that a connection could be established via the data connection interface. There are numerous connections available from the OSEGO and OGR libraries, along with WFS connections. The OSM provider is not currently in the list.