Using two ISPs
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first add a new routing table:

edit /etc/iproute2/rt_tables

add the following line: (rt2 for routing table 2)

1 rt2

computer is already setup to use wired linksys router at 192.168.0.1
so we are adding ability to use a 2nd ISP

wifi device is wlp2s6

bell router uses 192.168.2.1
computer uses 192.168.2.17

sudo ip route add 192.168.2.0/24 dev wlp2s6 src 192.168.2.17 table rt2
sudo ip route add default via 192.168.2.1 dev wlp2s6 table rt2
sudo ip rule add from 192.168.2.17/32 table rt2
sudo ip rule add to 192.168.2.17/32 table rt2

so this computer now has two ip addresses:

192.168.0.103 for wired linksys connection
192.168.2.17  for wifi bell connection

testing
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we can now specify which ip address (and ISP) used by wget

wget --bind-address=192.168.2.17 https://archive.org/download/cubexyz_gmail_C64/c64.ogv
wget --bind-address=192.168.0.103 https://archive.org/download/cubexyz_gmail_C64/c64.ogv