RickyB,
You really really do need some GOOD legal advice from a tech savvy Lawyer..
There are lots of claims, and it seems more like posturing and noise making on their behalf..
I go back on the trademark infringement.. THAT IS A COMMERCIAL Matter..
If you sent a mail or posted their name and trade mark in a defamatory mail or web post.. it is a defamation matter and HAS ABSOLUTELY NOTHING to do with Trademark infringement.
Like I said .. this is looking more like a harassment case.. that is one you can bring against them (Yes I accept you just want it to go away and put your experience with the Co behind you)
For you protection I would still get the PC's HDD imaged for forensic testing - this is not to say it will be examined.
In regard to the IP..
That seems to be a case of the Noise and posturing..
Depending on your ISP it will depend what is happening.. With your connection, I will assume One of the DSL's, You could have a static or dynamic IP. That is Your ISP permanently assigns your IP, it is fixed, never changes.
Or it can be dynamic, changes every time you connect - That is turn your modem off for 5 mins to 24hrs and reconnect different IP. It will normally be in the same higher level domain range.. like 123.123.xxx.yyy.
Doing a whois on your IP should point back to your ISP.
Some of the so called IP tools out there are Piss poor, they will tell you you live in the headoffice of your ISP, others will point you to your ISP's local POP/router/hub.
So don't rely on many of those online tools.
To do a test for yourself go to
http://whatsmyip.org/ record the IP, switch off come back in the morning and (after switching on) check the IP.. is it the same? OH..and for GOD's sake DO NOT POST THE IP ON HERE ..
On the same site you can do a whois - ie the owner of the IP and a Reverse IP - your local router's network name.
What I have seen so far of your story is like what you see with a Television clairvoyant.
Remember as was mentioned by Nihil.. THEY have the onus to prove. All you need to do is NOT PUT YOURSELF IN HARMS WAY.
If you Lawyer does not have an adviser in IT matters or is profficient in IT/internet related cases.. get another..
Confront Him on the case, let him know your concerns.. address the areas of the claims ..
Oh and ask about getting your drive forensicly imaged. Even if he says no.. Buy a new HDD, store the original in a sealed Bag and place in a secure vault. The new one.. do a fresh install of your OS and programs, and ANTI VIRUS and operate the PC as normal get on with your life.. Well except.. for..
DO not use any of your current Webmail accounts, open new ones..
Create new accounts on craiglist etc
Do not read or reply to mails claiming to be from former co-workers or your former employer.. forward them to your lawyer (ask him/her before you do)
AND REmember.. they are making the noise.. They have to prove that you did what they claim..
Most of what they seem to be saying seems more like noise making , posturing... HARRASSMENT..
all the best with your challenge