You simply have to ensure that the multinationals and foreign investors can not succeed in their aims; that they can not get a return on their investments, that they can not make the profits they hope for. You have to prove to them that you can prevent them from succeeding unless they use their power in ways that respect the will and aspirations of the population.
In everything they do, they conduct a cost / benefit analysis. If the cost is greater than the benefit, they will not continue. If you offset their profits, or expected profits in Egypt, by increasing their costs; they will listen to your proposals for how to alleviate those costs. If you can offset their measures to increase efficiency by creating logistical problems in their supply chain; they will listen to your proposals for how to solve these problems.
Facebook is not the appropriate venue for discussing strategies and tactics in detail, this should be done on the ground with people you know and trust. The strategic concept is straightforward, however.
Your analysis of the target of your action should consider as many components of its system as possible: financing, supply chain, partnerships, subsidiaries, logistics, key departments of the company and staff, physical location, and so on.
Find out who the shareholders are, the executive staff, important financiers and new projects and contracts they are involved in.
If you want to send a message to a major shareholding investment firm like Vanguard, perhaps you can choose to target any retail companies they own, as companies that deal directly with the public are generally easier to disrupt. You can then convey your demands to the investment firm itself, noting that their retail holdings in Egypt will cease to turn a profit if your demands are ignored.