#!/bin/bash
s='#Tito

192.168.1.21
192.168.1.119

#Hiko

192.168.1.243
192.168.1.125
192.168.1.94
192.168.1.24
192.168.1.242

#Pico

192.168.1.23
192.168.1.93
192.168.1.121'
awk -v RS= '/^#Hiko$/{getline;print;exit}' <<< "$s"