Question: [![enter image description here](https://i.stack.imgur.com/I8qAm.png)](https://i.stack.imgur.com/I8qAm.png)I want to have a wired Internet connection before or after a PoE access point.

Is that possible?

Answer: 
For PoE to work, the last device before the PD (powered device, in your case an access point) needs to be the PSE (power sourcing equipment, in your case the PoE "injector", also called a Midspan). Your options are a) remove the PoE injector and install a switch which supports PoE instead between the firewall and AP, or b) run a second network cable from the firewall to a new switch in parallel with the AP cabling.
The Access point has the Ethernet port,there you can connect a PC or Switch.from that port you can get access

user will get access on the same AP IP range.