Does Active Directory's Kerberos implementation support per-user ticket lifetime settings?

Solution 1:

Per my reading of it, no. It's like Password Policy - it's defined at the domain level.

http://technet.microsoft.com/en-us/library/cc757692(v=ws.10).aspx#w2k3tr_sepol_accou_set_hpjo

The policy settings under Account Policies are implemented at the domain level.

Fine-grained password policies can't be used for this, because they don't include Kerberos settings.

http://technet.microsoft.com/en-us/library/cc770394(v=ws.10).aspx

A PSO has attributes for all the settings that can be defined in the Default Domain Policy (except Kerberos settings).

Sorry to say, it appears you're out of luck.