Talvez você possa dar uma olhada na seção "links" da configuração do Synergy
links
[...] A link indicates which screen is adjacent in the given direction.
Each side of a link can specify a range which defines a portion of an edge. A range on the direction is the portion of edge you can leave from while a range on the screen is the portion of edge you'll enter into. Ranges are optional and default to the entire edge. All ranges on a particular direction of a particular screen must not overlap.
Example:
section: links
moe:
right = larry
up(50,100) = curly(0,50)
larry:
left = moe
up(0,50) = curly(50,100)
curly:
down(0,50) = moe
down(50,100) = larry(0,50)
end
[EDITAR]
Ok, ficou bem óbvio para mim, mas aqui está:
section: links
pc1:
right(0,25) = pc2
left(25,75) = pc2
pc2:
left = pc1(0,25)
right = pc1(25,100)
Eu não testei, mas deveria estar ok.
[/ EDIT]