I'm unable to recognize what's intended as GND or AGND in the picture.
To support star connected nets in autoroute, power plane connection and design rule check, you need to implement a kind of net connector component, if it's not already provided with your layout tool.
In the schematic view it's a jumper connecting two logical nets. In layout, it'a a piece of "non-electrical" copper shorting two SMD pads or vias. The non-electrical copper most be added to regular artwork in postprocess. You also need to correct netlist exported to test tools, e.g. IPC356.