As Taranira said, unless you use a proxy, both account will show as the same ip on trion end, but Archebuddy so long as your launching all your clients with it, provide a fake hardwareID so it look like multiple machine on the same network.
So long as you dont have 3-10 accounts on the same ip its usually not a problem, but even 10+ is possible in a legit scenario if you are on a shared connection (some university campus are one of such example).
As for the glyph warning, this is only true if you use multiple account on that machine. AB support running a single (main) client through Glyph, the difference is, the hardware ID in that case is the one of your machine (useful if your using AB on an account you play without AB as well).
So tldr;
- Yes Trion can see you have multiple account on the same IP but its not necessarily "illegal" due to internet sharing possibilities (family, workplace, school etc)
- If you are running multiple accounts, use AB not glyph to run them otherwise they will end up with matching HardwareID and that will greatly increase the chances of the accounts being linked together if one is banned.
- If you use multiple machines (1 for your main account, 1 for other accounts / multiaccount) then its better if you use your main account directly on glyph with AB open (AB will inject itself in the launch) so that the hardware ID is not a new random one but instead the one your main always used.