Assign multiple actions to one mouse button.

Now I'm going through Shadow Warrior and I ran into trouble. In the game, the right mouse button is set to an alternative katana strike, this is definitely convenient, but the same button cannot be assigned to zoom in on the sight of a firearm, the X key is set by default. So I thought, is there a way to programmatically bind two actions to the mouse buttons at once, for example stick to the RMB and the X key? Is it even possible?