No. Vetra keyboard multicasters only multicast keyboard input. Hooking a mouse up to it will not work.

Further, I know of no viable hardware method to multicast mice - EXCEPT wireless mice set to the same frequency and synergy with broadcasting. Multibox may be able to do this as well (?).

The wireless mice trick only works if you run the exact same resolutions on every client.

You can also macro quest acceptance, check the macro thread for details.