I (external contractor) was invited to an on-site meeting with our project customer and discussed with a senior colleague about their participation, learning they haven't yet been invited. When I asked+ the project lead whether my senior colleague shouldn't also participate, they confided the customer specifically asked for said colleague to not be included (reason not given) but asked me to keep this for myself. To make things probably more complicated, the project lead is an external contractor (as am I but via a different company) while my senior colleague and line manager are internal staff. Apparently I got dragged into some politics against my will or better judgement, so now I'm seeking advice how to proceed with this information. I seem to have the following possibilities:
- Keep this to myself, leaving my senior colleague probably confused about his omission - after all, the project lead should know what they are doing and why. This does however somehow feel wrong.
- Breach the project leads trust by informing my line manager. They're my boss after all, but obviously that will most likely be the last time the project lead was that honest with me.
Maybe there's a third, better way as well. So, how can I properly handle this?
edit The relationships seem to be a bit complicated, so let me try and clarify matters a bit: Company (or agency?) A contracted me to work for company B in a project for customer C. Company B is also supported by company/agency D's contractors. The project lead P is one of D's contractors, while my line manager L and senior colleague S work directly for "the" company B. The meeting is planned and held by the customer C, whom according to P specifically stated they don't want S to participate - I can only guess about their reasons, though from my work with S I doubt it's due to incompetency but rather due to S's firm stance on B not doing additional work for free for C; there seems to be quite some feature creep going on here.
+ I asked in order to make booking common traveling easier etc. though that's probably irrelevant.