Yes it's feasible.
Do you want any of them to turn it on and any of the others to turn it off, or do you want the one that turned it on to turn it off?
You could simply have all 3 switch the supply to the lights, however bear in mind that if you turn it on at the front door, you will have to go to the front door to turn it off.
Or get them all wired like a 3 way lighting system (see the wiki) so you can turn them on/off from any point.
https://www.diynot.com/wiki/Electrics:Intermediate
This depends upon what you have available in each switch (i.e. if the pir has a dpdt relay) or you may need to have the pir power a dpdt relay.
Think about how you want it to work though.
When the timer is in "on time" do you want the lights on during this time or to come on by the pir during this time?
Do you want the pir to turn them on at any time?
Do you want the switch by the door to override them all?
Think hard about how you want it to operate - then let us know.