Yes, you can.
The ip cameras are getting channel numbers after the last analog camera. So, in your case, the firs IP camera will be channel No9
In order to display your three analog and one ip camera in a 4 window display, you must simply go to the Matrix Setup and in the section of Display Setup, select the 9th camera to be displayed in the 4th window.

Then, when you exit setup menu, just chose the group with this modified layout.

Hope I helped :)