Wireshark is a tool for packet filtering in network adapter.
Use following steps to capture packets in Wireshark.
1) Start network interface for capturing for Wireshark Capture/Interfaces
2) Enter filtering in Wireshark filtering option under menu bar
Ex :- ip.addr==126.96.36.199
Above is a filtering packets for ip "188.8.131.52"
3) Right-click on a packet and Follow TCP stream. This gives packet contents.