finally found a way to specify the local ip

app/manage-connection/manage-connection.go

 package manage_connection
+
+import (
+	"fmt"
+	"net"
+)
+
+func CreateConnection(destinationAddress string) net.Conn {
+	fmt.Println("Trying to connect to ", destinationAddress)
+	// connect to ip with tcp and add the ip of the sender to the connection
+	conn, err := net.Dial("tcp", destinationAddress)
+
+	if err != nil {
+		fmt.Println("Error while connecting to the neighbour", err)
+	}
+
+	return conn
+}
+
+func CreateConnectionWithSpecifiedLocalAddress(senderAddress string, destinationAddress string) net.Conn {
+	dialer := net.Dialer{LocalAddr: &net.TCPAddr{IP: net.ParseIP(senderAddress)}}
+
+	conn, err := dialer.Dial("tcp", destinationAddress)
+
+	if err != nil {
+		fmt.Println("Error while connecting to the neighbour", err)
+	}
+
+	return conn
+}
\ No newline at end of file