first of all - sorry for spamming, I hope this will be useful to CLS/CLP/PCLPs (or newer name versions).
Please note that, in order to enter the group, you have to be certified in one of the IBM Lotus certification paths (System administration or Application development) in any of Lotus Domino versions.
Therefor in your e-mail (LinkedInEEGroup(at)gmail(dot)com) please include image captured from IBM Certification web site:
(Professional Certification > Member Site > Member Services > My Certifications). Please make sure the name and certifications are visible.
If that's not convenient for you, you can scan your "Professional certification program from IBM" plastic card which you have received from IBM through mail and send that, or send any other viable certification proof.
To request membership:
If you have some further questions please send me an email.
Thank you for appreciation of these strict rules,
Marko Bonaci, IBM PCLP
LinkedIn Lotus Group Admin
PS There is also ExpertsExchange certified experts group on LinkedIn (send your EE profile url):