Two connections, one cable

Hi everyone, let me say that I’m a nobody when it comes to networking :)

I live in an where each space has one Ethernet coming in said space, through a hub not close to this space.

I need to have two incoming internet connections, one DSL, one point-to-point, both having their own Ethernet cables…

Could I use an Ethernet splitter on both ends (hub, then space) to separately connect and receive two signals, onto two different routers, on the same cable that runs from the hub to the space?

Any help is truly appreciated.